[oldguy829]

We have been stripping the frame to repaint it (It was done about 25 years ago and the paint just lifted off with a scraper). Under the top coat is a dark primer that seems to be very tight. It only came off where we did welding, mods, etc. and burned it off. We are finally ready to paint it, but since we only work on it on weekends, it will sit all week. What should we do before we apply the new primer? fresh sand the bare spots? use some kind of acid wash? Some other paint prep? Remember we are dealing with = original primer/bare metal/bondo. Thanks,

[Rob Keller]

Zinc Cromate Primer

3M seems to be a good brand name & you can get it in a spray bomb


R

[GMW]

I'd sand blast it on a day when I could bring it home right away and shoot it with epoxy primer, then reapply any bondo for smoothing if thats why your applying it.

[OneMoreTime]

Last hour of the day is for primering any bare spots..rest of it may be fine..

OMT

[oldguy829]

OK, I hear you. From now on the last hour of the day will be devoted to primering any bare metal. What this means is I can't slip out and work on it for an hour in the evening, because I don't have time to stop and paint.
So I did the unthinkable and spent many hours last sunday stripping the frame, and putting a thin layer of bondo over the rough spots, and going to bed at 10 PM, without painting the bare spots. So what do I do next Sunday afternoon when I get back on it? Specifically, what do I do about the bare spots that have been sitting all week?
Surely you have been interupted, and had to leave some bare metal set longer than you wanted. What did you do about it?

[OneMoreTime]

I just hit it with some sand paper and carry on..should not be all that much rust to deal with..one can do the zinc chromate deal as well with a spray can in that event..

I do understand about the hobby deal as I do that at home myself..

OMT

[oldguy829]

thanks. that's what I needed to know. someone else mentioned the zinc chromate primer, I'll check it out. All I know about is the good 2 stage primer that has to be mixed in the proper amount for a small job, which means more clean up than paint time, or the worthless primer in a rattle can.
For the next project - can i strip a small section and rattle can it as i go with this zinc chromate primer, and then scuff the whole thing one day and shoot it with epoxy primer? that would sure make life easier.

[OneMoreTime]

That would be a good way to go..just clean and sand good before applying epoxy..I keep 2 5 gal buckets with lids to clean my guns and do the rough clean in one and the final clean in another..saves time and solvent..

Zinc chromate should be available at your jobber or paint store..

OMT