Epoxy Primer Sealer - do I need to . . .

B

Bob in MO

I'm getting ready to paint my MGB. The hood, trunk lid, and doors have been removed. All parts have been sanded down to bare metal. My basecoat is metalflake so to avoid flip-flop effect I plan on spraying the underside of the hood and trunk lids and the inside faces of the doors before the other parts. For the areas mentioned above, I plan on applying only Epoxy Primer, Basecoat, and Clearcoat (no 2K Primer).

Question: Do I need to spray a coat of Epoxy Primer Sealer after the last Epoxy Primer coat and before the first Basecoat or can I spray the basecoat on the last epoxy primer coat?

When I paint all the other exterior surfaces I plan on spraying:
3 coats Epoxy Primer (6610)
3 coats 2K Primer (6520-1)
1 coat Epoxy Primer Sealer
3 coats Base (Deltron 2000 DBC Metal flake)
4-5 coats Clear (4000-4)

Another question. I plan on mixing the Epoxy Primer Sealer by mixing 1 part Epoxy Primer to 1 part Epoxy Activator. Then I will add 3 ounces of my basecoat's reducer to 1 quart of the 1:1 mix. For clarification, that would mean that I would have 35 ounces of Epoxy Primer Sealer.
Does that sound OK to you guys.
 
My understanding is that the sealer creates a smoother surface for your base vs going over unreduced epoxy. Maybe reduce your last coat of epoxy to smooth it out a bit.
 
If you are using SPI Epoxy all the way thru to the time your ready for paint you would have no reason to apply Epoxy as a seal coat, just sand everything as you would 2K (400-600 grit) and paint. The seal coat is primarily used to help prevent any bleed-thru from bondo and help with covering any finer scratches that might show thru the base-coat (some silvers show everything even 320 grit). So IMO putting a seal-coat down would not be needed unless you really want too.
If you are going straight to paint after Epoxy try to get the Epoxy down as smooth as possible the first time putting a smooth coat down after a rougher first coat really wont smooth out any heavy orange peel issues unless you sand it smooth.

Dave
 
You must log in or register to reply here.
Back
Top