I have purchased new outter fenders, inner fenders, radiator support, doors, ect. my question is what do I need to do with the new panels before I primer them with epoxy primer then high build primer. the primers and paints I will be using will be PPg products. DP 90 LF and then K-38. so I am wondering what kind of prep to do on these new replacement panels before I shoot them with the DP 90 LF.
I would realy like your input because I would hate to do something wrong nad have to start all over because something I missed. thanks

You do plan on installing these new pieces before painting them, right?

I'm guessing you are asking me if I have fitted the panels first?. YES I haveand no problems everything looks real good and lined up well. but my question again is... do the new panels need preped some way or can I just go ahead and primer them

from what I've seen here on the board the guy's are just scuffing and priming.

I'm using PPG's DBU, and the product information sheet has information about painting edp coated panels with dbu. You can get the information you need at www.ppgrefinish.com and read the specific instructions.

TB-005 (10/97)
FACTORY/OEM
REPLACEMENT PANEL PROCEDURE
Most all current factory/OEM replacement panels are coated with Electrocoat
(E-coat) Primer. This baked E-coat provides a smooth satin finish and offers
excellent corrosion resistance. The following system is recommended for identifying
& refinishing these replacement panels.
First, test the replacement panel to ensure that it has E-coat primer on it by
lightly rubbing an area with DT Reducer on a rag. If after several wipes the
primer begins to come off, this would indicate that a thermo-plastic primer has
been applied and therefore, must be completely removed prior to refinishing.
A true E-coat panel will not be affected by the reducer.
Once assured that the panel has cured E-coat primer on it, proceed as follows:
Thoroughly clean the entire panel with DX 330 ACRYLI-CLEAN®
Wax and Grease Remover.
OPTIONAL: Sand the E-coated panel with 400 grit machine sand
or 500 grit hand sand. Reclean with DX 330.
Apply one of the following:
DP Epoxy Primer/DP 401 reduced as a sealer (1 - 2 coats)
DP Epoxy Primer LF/DP 401 LF reduced as a sealer
(1 - 2 coats)
K 36 PRIMA™ Acrylic Urethane Wet-On-Wet Sealer (1 coat)
See Product Information Bulletin P-122 (DP), P-196 (DP-LF),
P-169S (K 36) for the recommended dry time to topcoat.
Refinish with any recommended PPG Topcoat System per
instructions.

When ever I see that optional sanding thing I cringe. As much work as scuffing can be I can't imagine not doing it. I always fear putting thousands of dollars of paint on and having it peel. What do the pro's here have to say about not scuffing a new panel like that and putting seal and prime right over top?

Dry sand with a DA and 320 grit sandpaper, apply sealer and then you can paint right over that if there is no need to primer and block the panels. I do not know what condition they are in. If you need to primer and block them some, then sand with 320 DA and then primer them. Only seal them right before you are going to paint. Otherwise you are wasting your money on sealer if you are going to primer over them.

well I took a scotch bright pad to the new aftermarket panels and primed them today. Al I have left to paint are 2 boxes of misc. parts and the epoxy primer is on. the K-38 is next, but the weather has changed. little chilly.also need to make #3 temp paint booth but heck progress is got me all wound up. the plastic paint booth is working pretty good there is still a little problem with the size area to work in but heck its doing the job.

Sherwin Williams has a sealer with a NO sanding recommendation :rolleyes:
Sorry if you are TOO lazy to scuff a panel well then...Ill keEp that to myself.

Anyway you can scuff up your panels with 400 grit on a da or a gray scuff pad.
Dont remove the coating YOU CAN NEVER APPLY A COATING BETTER THEN THE E-COAT SO DONT REMOVE IT.

Becareful with that epoxy and cold temps, if you DONT apply it in a climate around 60 degrees and it stays that way for a certain period of time that epoxy will NEVER CURE. So make sure your booth is 60 degrees and above during spraying and after spraying.

Appling a coat of epoxy wont hurt nothing

do the panels from LMC come e-coated?