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Old 10-29-2017, 08:34 PM   #1
mongocanfly
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blast or sand

got me a new project..actually my dads 57 IH 4x4...as if I didn't have enough to do..I know its not gm but based on the surface rust that can be seen in the pics should I just sand away the rust and scuff original paint or sandblast it all to bare metal and epoxy prime the whole thing?...its the original paint..almost zero body work needed...60yrs old...this thing is in unbelievably good condition..going to be painted red and white when done...
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Old 10-29-2017, 08:49 PM   #2
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Re: blast or sand

Sanding alone wont remove the rust from the pits. You could strip to metal with 80 grit then cover the rust areas with navel jelly which will eat away the rust leaving you nice clean metal.

If you blast it find a reputable guy, if he talks about blasting warping a panel due to heat.....run! A good mix of blast media is crushed glass and plastic beads.
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Old 10-29-2017, 09:14 PM   #3
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Re: blast or sand

thanks...its not pitted..just surface rust..at least from what i can see...and yeah I know about the heat myth from sandblasting...I've got access to a blaster and can do it myself...but I also have a good blaster local to me as well...
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Old 10-29-2017, 11:51 PM   #4
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Re: blast or sand

Blast for sure. Better to be safe than sorry.

Could you do it properly without blasting, yes.

Would you want to shoot yourself after spending 5x the amount of time doing without blasting, yes.

Just get it blasted.
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Old 11-04-2017, 02:36 AM   #5
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Re: blast or sand

80 grit DA the flat surface areas. Then follow up the rest with blasting. I had my cab blasted, the best $225 I have spent.
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Old 11-04-2017, 09:46 AM   #6
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Re: blast or sand

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80 grit DA the flat surface areas. Then follow up the rest with blasting. I had my cab blasted, the best $225 I have spent.
80 grit DA takes forever to strip surfaces. I use either one of those fibrous 3m stripping wheels or a 36 grit roloc pad. There's no time to screw around with 80 grit on a DA if you're trying to get down to bare metal
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Old 11-04-2017, 01:09 PM   #7
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Re: blast or sand

I can't make it clear enough, sand blasting "can" very easily create horrendous warping damage. I have seen cars RUINED by a "pro" sand blaster.

I don't mean "Damn I have more work to do" kinda damage. I am talking "HOLY F_CK IT'S RUINED AND I HAVE TO THROW IT AWAY" kinda damage.

The myth that the warp is created by heat is one of the reasons for the damage. People think if it's not getting the metal hot than it must be ok. Well it's a MYTH, the real cause of the damage is the little bits of sand are acting as a hammer thinning the top layer of the metal.

If you end up blasting it, you better damn be sure it's done properly. Most "media" outside of sand doesn't remove the rust, so it's a moot point.

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Old 11-04-2017, 02:52 PM   #8
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Re: blast or sand

I agree about the sandblaster warp...a buddy of mine had a flawless 72 hood ...except for surface rust...his dad has a commercial grade blaster...well they stood the hood up vertical and blasted away the rust...then his hood had a real nice "" pattern in from the bracing underneath...
I guess ill try the sanding and naval jelly first and see what happens...
I know it doesn't matter but these old IH trucks feel like they stamped em outta 1/8" sheetmetal..so they pretty stout...the other donor truck for this project is my dads original truck...30 years ago he had the whole truck sandblasted and primed...that's the way it still sits. .its no show truck but there's no major blasting warp issues that I can see at the moment
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Old 11-04-2017, 03:11 PM   #9
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Re: blast or sand

Yep I had a very experienced sand blaster RUIN a once perfect 1928 Buick door for me.

Brian
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Old 11-04-2017, 04:00 PM   #10
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Re: blast or sand

Martin...on the original paint will just sanding it good and laying epoxy primer over the original paint be ok....I think I remember you saying once before...."if its been there that long why remove it".....paint that's been on there for 60 or so years...I'm just not sure how new primer and paint may react to the original paint...well where there is paint...
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Old 11-05-2017, 11:18 AM   #11
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Re: blast or sand

I would sand it off, it's so easy at that point.

Brian
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Old 11-05-2017, 03:43 PM   #12
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Re: blast or sand

ok thanks guys...ill be talking to a blaster this week and feel him out..and go from there...will be nice to start with nice clean metal...trying to hand sand it all off may be more than I'm wanting to do
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Old 11-05-2017, 07:29 PM   #13
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Re: blast or sand

If you sand it, use a da sander something like a National Detroit DAQ. If your da has a finishing orbit(3/32) it will take forever.

For cleaning out the rust pits you could get one of these, they work awesome.
MBX bristle blaster, other tool companies make one as well. Snap on, mac, matco, dent fix, dynabrade, etc.


http://www.mbxit.com/products/bristle-blaster-c-6.html
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Old 11-05-2017, 08:38 PM   #14
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Re: blast or sand

What about having it soda blasted? and don't have the nozzle too close to the material. I know however that that hood has pretty thick metal
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Old 11-05-2017, 09:12 PM   #15
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Re: blast or sand

once before I checked into one of those dustless blasters that uses glass beads and water for doing my AD truck...guy said 2k plus mileage. ..closest one I could find was Chattanooga. ..about 3 hrs from me...
we've got a commercial grade soda blaster at work but the soda doesn't remove paint or powder coat all that good and its in the plant so i couldn't use it on the truck...I can haul smaller parts in and out though..
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Old 11-06-2017, 12:50 AM   #16
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Re: blast or sand

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What about having it soda blasted? and don't have the nozzle too close to the material. I know however that that hood has pretty thick metal
Soda blasting can be very funky as well. Look into it, I forget how you can't use any acid etch or metal prep, it got funky. Do some home work. But I don't see a need.

MOst of that truck everything would sand off, only those front fenders are the only things we are talking about here. Sand some and then see what you have, see how pitted is it? Could you do some of your own spot blasting at home with something like this. https://www.northerntool.com/shop/to...2824_200022824

I do a combination on most stuff like that. The inner structural areas have it sand blasted if you have a guy who can be trusted. Then the outer areas strip it with an orbital sander and then spot blast it with Black Diamond.

If you don't have a nice orbital sander as Eric suggested, buy one, you will need it in the future for body work anyway, great tool to have.

These here are AWESOME for cleaning up minor rust. https://www.walmart.com/ip/Carborund...&wl13=&veh=sem

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Old 11-06-2017, 01:09 AM   #17
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Re: blast or sand

I've got one of those 5 gal sandblasters from sears and roebuck that I've used for small stuff...I've also got some of those paint removing disc you pictured...I've got the inside track on those.. (I work for 3m)...we have returned goods sales at work so I have a near endless supply of autobody stuff...
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Old 11-06-2017, 01:18 AM   #18
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Re: blast or sand

I can speak of direct experience having soda blasting done and due to the humidity in the air, it packed into crevices that will take you months to get cleaned out. I'd suggest you DA as much as you can, I wouldn't solely blast surface rust, that's me. then find a good media blaster (plastic/glass beads) and have them go over what you couldn't get to, and make damned sure you get get an "experienced" blaster that has had previous experience in doing this kind of work. If you find much pitting, then I'd fall onto a surface prep and or bondo to smooth the surface before priming/painting.
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Old 11-06-2017, 10:20 PM   #19
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Re: blast or sand

Just another thought Mongo, do you have a Redi-strip facility available? I've had fenders done and they came out very clean.

Don't know how far you are from St. Louis. A buddy of mine there is a professional metal shaper and he also does blasting, so he understands what is going on with blasting stretch and how to avoid it.

And like a couple guys mentioned, you can probably get it cleaned up yourself. Solid looking truck there!
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Old 11-06-2017, 10:32 PM   #20
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Re: blast or sand

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Just another thought Mongo, do you have a Redi-strip facility available? I've had fenders done and they came out very clean.

Don't know how far you are from St. Louis. A buddy of mine there is a professional metal shaper and he also does blasting, so he understands what is going on with blasting stretch and how to avoid it.

And like a couple guys mentioned, you can probably get it cleaned up yourself. Solid looking truck there!
Really huh! Looks like a fun project, no crap, just regular old "fixing up" and wham a daily driver.


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Old 11-06-2017, 11:04 PM   #21
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Re: blast or sand

Doug I've seen that immersion removal done on a few tv shows but I don't know of anywhere near me that does it...
yeah I could clean it myself given enough time but I'm kinda rushing this so my dad can enjoy it...he's 83....but I want to do it as right as I can without dragging it out 4 or 5 years....keeping in mind I'm no bodyman...I have done a few trucks bodywork and paint...

as far as solid, yall can't imagine how clean and rust free this truck is...I only wish my AD was this solid...even the paint in under the fenderwells looks good...all the bolts I've looked at are even clean and rustfree
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Old 11-10-2017, 08:36 PM   #22
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Re: blast or sand

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Doug I've seen that immersion removal done on a few tv shows but I don't know of anywhere near me that does it...
yeah I could clean it myself given enough time but I'm kinda rushing this so my dad can enjoy it...he's 83....but I want to do it as right as I can without dragging it out 4 or 5 years....keeping in mind I'm no bodyman...I have done a few trucks bodywork and paint...

as far as solid, yall can't imagine how clean and rust free this truck is...I only wish my AD was this solid...even the paint in under the fenderwells looks good...all the bolts I've looked at are even clean and rustfree
I'd try to do what you can by yourself to see if you get the results you want, then move onto the next attempt. Only you know what the surface condition is, so I'd move slowly to try all you can 1st. As you see, there's a lot of opinions and we've all done what we think is the best way, and many times, we'll move onto to other directions. Best of luck
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