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Old 07-26-2017, 11:39 AM   #1251
swamp rat
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Re: Rat repair.

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Originally Posted by 7dee2 View Post
Sorry to hear the truck work was kicking your butt, it's been really hot the Rat needs you Mike..
Yea I know that sounded pretty pathetic didn't it. LOL! Truth is I have bad legs and feet so sometimes i push too hard.

Ground out the old bondo and pulled out the dent a little with my stud puller, hit it with a little acid etch then started applying new mud yesterday, got it roughed in. Naturally I forgot to snap a pic again. 🙄
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Old 07-26-2017, 11:52 AM   #1252
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Re: Rat repair.

No worries! Ha, I love my big swamp cooler, been camped out in front of it all summer!
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Old 07-27-2017, 12:20 AM   #1253
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Re: Rat repair.

Late start after work, realized I still had to go get the EX-3 extractor, more kroil and heat, 3 times no budging it, drilled it up a bit more, repeat, nope! Drill up to 1/4", more heat and oil, nope! Brought out the chisel, center punch and a sharpened drill bit and started chipping away at it, tried to start a tap got a little ways then because the hole was off a little on the back side it dislodged it a little so I tapped it out from the back side then ran the tap through it, figure I got about 75% of the original thread remaining. That only took me 2.5 hours including the trip to the hardware store.
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Old 07-27-2017, 11:48 PM   #1254
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Re: Rat repair.

Just more bondo and sanding, one of them days it seems that ya just get nowhere but ya know its better than yesterday.
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Old 07-28-2017, 12:00 PM   #1255
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Re: Rat repair.

I suspect most of us following have "been there, done that" and had those days. Keep up the good work.
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Old 07-31-2017, 12:29 AM   #1256
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Re: Rat repair.

Well this is where I'm at, ran out of high build and self etching primer but I think the outside of the fender is almost done. Per the area in front and below the marker light, I seem to have added considerably more mud than what was on it, but it just seemed like it needed it.
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Old 08-04-2017, 09:05 PM   #1257
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Re: Rat repair.

A little advice please, I should have probably sealed the fender in primer right after I sanded the paint off the fender because I got sidetracked and progress stopped, now my finger oils have created some surface rust, what's the best way to remove it? Don't want to over sand, should I wipe it with something that will eat the surface rust like the Gem rust killer I have then a light skuff with a da?
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Old 08-04-2017, 09:33 PM   #1258
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Re: Rat repair.

Hey Mike, looks like you are making some good progress. It's looking good.
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Old 08-04-2017, 11:12 PM   #1259
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Re: Rat repair.

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A little advice please, I should have probably sealed the fender in primer right after I sanded the paint off the fender because I got sidetracked and progress stopped, now my finger oils have created some surface rust, what's the best way to remove it? Don't want to over sand, should I wipe it with something that will eat the surface rust like the Gem rust killer I have then a light skuff with a da?
You can make up some prep solvent by mixing equal parts isopropyl alcohol, acetone and water. Shake well, pour a small amount in a dish, then dip a grey or maroon scuff pad into it and scrub the affected area. Wipe it with a clean cloth or paper towel to remove the residue. Let the area dry thoroughly... at least 45 minutes in warm sunshine. Self etch or epoxy primer will bite right thru any tiny amount of surface rust that remains.

GEM Rust Killer is a "converter" (phosphoric acid + iron oxide = iron phosphate) which is a great surface prep for powder coating. If you plan to epoxy primer over it, you may want to first treat it with a mildly acidic solution like vinegar and water or 20% HCl. At least that's what some epoxy manufacturers recommend. Others say just squirt the epoxy right over the iron phosphate. At a minimum, if you treat it with the GEM, I'd scrub it good with the prep solvent I described above before applying any primer. And as I mentioned, it needs plenty of time to dry thoroughly.
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Old 08-12-2017, 09:36 PM   #1260
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Re: Rat repair.

Ok , nice break in the heatwave/forest fire smoke wave from Canada that we have been dealing with for about 3 weeks, figured I best get a little more done, sanded the front bondo coat down a little as I thought it was a bit excessive, made the 3 parts Water/Acetone/Denatured Alcohol and scrubbed off the surface rust, grabbed my DA sander and gave the exposed metal a quick skuff, then a light hand skuff on the bondo areas, gave it a good wipe down and shot 2 coats of K2 on the outside. Will let it cure for a bit before I do the inside. Yes the pic is upside down, no time to download to my computer and edit it. 😁
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Old 08-13-2017, 09:26 AM   #1261
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Re: Rat repair.

Nice job on the fender, looks great!
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Old 08-13-2017, 08:49 PM   #1262
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Re: Rat repair.

The fender looks really good. You are making great progress.
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Old 08-15-2017, 12:03 AM   #1263
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Re: Rat repair.

So I do seem to approach things a little backwards sometimes, I probably should have prepped and primed the inside first, it was just a little messy! The driver fender wasn't near as bad as this one so I didn't prep or prime the inner part at all but this side needs all the primer and paint it can get. Spent today prepping, masking, touch up sanding and wiping the inside with alcohol, then Mineral spirits, then hung it up, will give it a final wipe down with wax and grease remover tomorrow before I prime it. ( and again the pic needs to be rotated, it's hanging upside down ).
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Old 08-15-2017, 10:41 PM   #1264
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Re: Rat repair.

Got the inside primered about an hour ago, maybe 2? Was sitting here thinking how nice it would be if I could just mix up some color and top coat it without any prep within a certain timeframe, is this a pipe dream?

This is PPG DP50lf grey primer and DP402lf catalyst.

Top coat is DCC single stage with DT reducer and DCX61 hardener, ratio 4:2:1

This is the pdf for the top coat. http://www.myrv10.com/N104CD/paint/p-168.pdf
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Old 08-16-2017, 11:45 PM   #1265
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Re: Rat repair.

Well should have known, hang a part upside down in a cramped booth and your going to miss an area..... Sanded, prepped and masked off the area, will hit it tomorrow with the last of my Qt of primer, Also removed and replaced the air filters, I can feel the air flow much better now ..
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Old 08-17-2017, 12:46 AM   #1266
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Re: Rat repair.

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Originally Posted by swamp rat View Post
Got the inside primered about an hour ago, maybe 2? Was sitting here thinking how nice it would be if I could just mix up some color and top coat it without any prep within a certain timeframe, is this a pipe dream?

This is PPG DP50lf grey primer and DP402lf catalyst.

Top coat is DCC single stage with DT reducer and DCX61 hardener, ratio 4:2:1

This is the pdf for the top coat. http://www.myrv10.com/N104CD/paint/p-168.pdf
For DP50 I believe the posted recoat window is around 7 days. To make sure, you can put a small amount of urethane reducer on a rag and gently dab a tiny, out of the way spot on the fender and see if any of the DP primer transfers to the rag. If it does, you're good to go. However, if the primer is fully catalyzed and does not show on the rag, you need to scuff the surface before applying anything else.

That said, my "opinion" is that you should always final block any primer before applying a color topcoat. I no longer have access to a clean environment for painting, so a few dust nibs almost always find their way into my work. Also, you have to be a top notch painter to lay down heavy primers without some orange peel to the surface. I find it best to final sand the surface with 500-600 grit paper before applying the color coat... whether single stage or BC/CC. Just my $.02 worth.
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Old 08-17-2017, 10:57 AM   #1267
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Re: Rat repair.

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For DP50 I believe the posted recoat window is around 7 days. To make sure, you can put a small amount of urethane reducer on a rag and gently dab a tiny, out of the way spot on the fender and see if any of the DP primer transfers to the rag. If it does, you're good to go. However, if the primer is fully catalyzed and does not show on the rag, you need to scuff the surface before applying anything else.

That said, my "opinion" is that you should always final block any primer before applying a color topcoat. I no longer have access to a clean environment for painting, so a few dust nibs almost always find their way into my work. Also, you have to be a top notch painter to lay down heavy primers without some orange peel to the surface. I find it best to final sand the surface with 500-600 grit paper before applying the color coat... whether single stage or BC/CC. Just my $.02 worth.
Thank you for that, so basically if the primer is not fully cured you could spray a topcoat on it correct? I agree with you on the final blocking for visible surfaces though to keep the orange peel to a minimum. Not to mention if I missed as an area like I did it would be another fine mess. 😊 I will say though that im surprised at how hard this primer is in sanding after 24 hours , I am following a the directions of the paint store as to how to read the graduations on the mixing cup to achieve the ratio.
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Old 08-19-2017, 12:25 AM   #1268
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Re: Rat repair.

So I guess I learned something today, I have been sanding the primer with the black sand paper and mentioned earlier how hard the primer is to sand, after about an hour and a half of fighting it today I stopped and asked myself if anything else would work better, duh, my roll of body work sandpaper cut the primer way better, donno why I grabbed that black stuff to begin with.

So have the inside of the fender ready to apply color, also working this weekend so won't get a whole bunch of stuff done.
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Old 08-20-2017, 11:06 AM   #1269
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Re: Rat repair.

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Thank you for that, so basically if the primer is not fully cured you could spray a topcoat on it correct? I agree with you on the final blocking for visible surfaces though to keep the orange peel to a minimum. Not to mention if I missed as an area like I did it would be another fine mess. 😊 I will say though that im surprised at how hard this primer is in sanding after 24 hours , I am following a the directions of the paint store as to how to read the graduations on the mixing cup to achieve the ratio.
Yes, if the epoxy hasn't catalyzed completely, you can spray whatever you want on top of it. If it's outside the recoat window, you'll need to scuff it before squirting anything else over it. I've noticed epoxies from different vendors can be easy or tough to sand. Haven't shot any DP for a long time and don't recall how it compares to others, but they can be sturdier than the 2K primers. You can't go wrong mixing according to the manufacturers directions. Pictures look great! Wish I'd had time to come down to Tacoma and visit while we were in Seabeck, but it was a very short stay. Keep up the good work.
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Old 08-20-2017, 12:28 PM   #1270
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Re: Rat repair.

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Originally Posted by Vic1947 View Post
Yes, if the epoxy hasn't catalyzed completely, you can spray whatever you want on top of it. If it's outside the recoat window, you'll need to scuff it before squirting anything else over it. I've noticed epoxies from different vendors can be easy or tough to sand. Haven't shot any DP for a long time and don't recall how it compares to others, but they can be sturdier than the 2K primers. You can't go wrong mixing according to the manufacturers directions. Pictures look great! Wish I'd had time to come down to Tacoma and visit while we were in Seabeck, but it was a very short stay. Keep up the good work.
Ha Ha, You know if you came by I'd take a day off work and put you to work. LOL! Thanks for babysitting my brain again! 😊
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Old Today, 12:34 AM   #1271
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Re: Rat repair.

Put down a couple coats of color tonight, of course I cant spray into hidden areas so I don't know the best way to protect it if primer isn't enough, then again I didn't get the primer in there 100% ether,, guess use a brush? Humm, maybe I should have done that before I sprayed color.. LOL!
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