1968 GTO enduro bumper help

66GTOconvclone · 04-04-2008, 08:09 PM

Hello all, thanks for tips on the headers, now I am jumping back to try and finish my 68. Is there some special primer or way to prepare the surface of the bumper to keep primer sticking to it? I bought one from a swap meet a few years ago that needs redone, its in decent shape, just a few nicks and scratches. I filled them with spot putty and sanded and primered it but its been sitting (inside) for a year and now its peeling in some places. Any help is appreciated.

GTO JUDGE · 04-06-2008, 08:58 AM

You may want to shoot Andy68GTO a PM he had his 68 done. He may be able to help you out.

Welcome to the site.

Sloop_John_B · 04-06-2008, 09:28 AM

Last I heard you need I special primer, but my advice is coming from the mid 1980's, so maybe Andy can help you out.

05GTO · 04-06-2008, 08:39 PM

You will need an adhesion promoter, here are instructions from PPG;

Quote:

1. Sand substrate with 400 grit paper. Blow off surface.
2. Clean with SX1004 Plastic Cleaner & Prep.
Application Procedure: 1. Apply 1 light coat of SX1050 Plastic Adhesion Promoter, then 1 full wet coat,
allowing 5 minutes between coats. Use 20-25 psi at the gun for conventional equipment
and 4-6 psi at the cap for HVLP equipment.
2. Allow to flash a minimum of 10 minutes and maximum of 30 minutes before topcoating.
3. Apply tinted PPG Sealer if desired. Proceed with the appropriate PPG Topcoat system.