Primer Touch up

[glemon]

I am prepping a car for paint, I have applied epoxy primer surfacer, despite trying to be careful I have sanded through a couple of edges to the substrate, in some cases metal, in a couple spots filler, I do not want to mix up a batch and spray again or spot with the big gun.

Here are the options I have:

1. Use the Duplicolor self etch green paint I have on the shelf of many spray paints in the garage

2. Upgrade and get some rattle can SEM or NAPA 7220

3. Mix a small batch of the epoxy primer and airbrush it on

I am leaning towards two, and intrigued by three, I won't do one unless a wave of cheap and lazy hits (not outside the realm of possibility), anyway back to the airbrush idea, in my mind why not?, I will get the quality product, it seems it should work, but some of what I have read online has discouraged it, mostly seemingly speculation that the airbrush and orifice can't handle a heavy primer, and or it will go on to dry and not stick well, any thoughts or experience?

 

[Brinkerhoff]

I've been finishing my bodywork and undercoats with DP40LF primer as a sealer for years now and never had and adhesion or telegraphing problem with the color. I'll reduce it 60% with a med temp reducer and spray a nice wet even coat over everything , then let it dry overnight. Wet sand with 600 and spray color. You really need that unbroken film to spray today's aint over for the best results. The tendency is to spray with the material too thick which makes it too hard to finish sand.

 

[Jerry]

I never tried brushing the epoxy primer on , but why not try it, you have to sand it anyway before the final paint. The paint house that I use says they spray the final on the primer within 2 hours of the primer being put on so no sanding is required. Sounds great, but I always find areas that need a little attention once the primer is on the car. So I prefer to sand, knowing that the adhesion of the final paint will be better. Since my paint work is only 3 years old right now, I can't tell if it made a difference yet.
I have decided that painting your own car is a lot of worK.
Jerry

 

[Bayless]

I don't think you'll have any luck with the airbrush. I found that even my touchup gun doesn't do an adequate job with any kind of primer and its orifice is much larger than the airbrush. I would just "bite the bullet" and break out the primer gun. You really want some over spray to blend it over the surface to minimize sanding anyway. I think that's the only solution you will be happy with.

 

[glemon]

Thanks for the suggestions, I should probably have mentioned the car will get (got actually) a coat of sealer before the topcoat. I used the rattle can spray primer from NAPA, it was painted today, painter said all looked fine before, I am anxiously awaiting seeing the results tomorrow.