|
If you use the good stuff, 2 part epoxy primer from the paint store it should be fine w/o a top coat. It's not porus like the old primers. Rattle cans are not any better. Self etching is old school and doesn't really have any place in modern paint & bodywork.
So weld your new panels in, sand everything, hit it with a rust converter, wait the time spec'd by the converter (they're all different, read & follow the directions) mix a small patch of primer & brush it on. Give it several hours to dry. Then mix & brush on a second coat.
I didn't mention, there is a time window on this stuff. PPG DP is 24 hrs. Ask about the window on the stuff you buy. Normally with a spray gun you would shoot the epoxy, let it flash (dry) then cover that with high build primer, within the recoat window. If the window expires you hit it with another coat of epoxy (no sanding) then the next coat, HB primer or topcoat within the new window.
If you do want to topcoat use a single stage urethane.
Expect some sticker shock, $50 or so for a quart. The paint I plan to use on my Jetstar is over $400 for a gallon and that doesn't include clear.
I'm no expert on this, just a hobbyist. I can direct you to a board where professional bodymen will answer your questions.
Don
|