Finishing Models

Hello All

Some where in discussions mention was made of a PPG undercoat that was easy to sand. I cant find that article as I feel it was embedded in a thread. Can some one help? I hope the US product numbers translate to Australia as PPG is here with their products.

K&B was my favourite as it was easy to use and white so a thin coat of colour covered with out blotching.

Thanks John

John Quigley

I just got done using a PPG light grey primer surfacer. I dont have the number right here but will check it later. Any of the acrylic lacquer sanding primers should work ok.---But they are VERY heavy. Put it on light and sand it till you can see through it.

I'm not sure I would use this stuff again. It sands easily but once you get the surface smooth and flat, the show throughs really make overcoating with transparent paints difficult.

Any of the data sheeets for the topcoat product you intend to use will have a compatible primer listed. Like Godzilla indicated, any of (even cheap) acrylic lacquer sanding primer/surfacers should be ok with PPG Omni (one of his recommendations and what I just used)

LAST EDITED ON Jul-02-03 AT 08:07 AM (CDT)
 
>Any of the acrylic lacquer sanding primers should work
>ok.---But they are VERY heavy. Put it on light and sand it
>till you can see through it.

I don't think they are heavy if sanded thin enough. Most dope primers don't really fill that much. The color does a lot of the filling, not to mention the clear. In a basecoat system the primer preps the surface because the color will not fill under normal circumstances.

>I'm not sure I would use this stuff again. It sands easily
>but once you get the surface smooth and flat, the show
>throughs really make overcoating with transparent paints
>difficult.

Always use a blocker coat. Always. I use white, Doug uses silver or white depending on the color. Just a light dust coat makes the whole plane white.

>Any of the data sheeets for the topcoat product you intend
>to use will have a compatible primer listed. Like Godzilla
>indicated, any of (even cheap) acrylic lacquer sanding
>primer/surfacers should be ok with PPG Omni (one of his
>recommendations and what I just used)

One of the primers we discussed was the the PPG K-36 urethane primer. I like it for the topcoat. It is very hard, which makes it very chip resistant and it has superior "holdout" for a superior gloss and surface. It does not fill as easily as lacquer primer though.

If you are just starting stick to the lacquer primer.

Since there have been so many questions about the auto paints, I decided to post the whole method in the Reviews section.

http://clstunt.com/htdocs/dcforum/DCForumID9/59.html

Hi Brad:

Actually the method is really nice--I need to check the final finish weights and hopefully my efforts to sand the primer to "see thru" thin will justify its use again as you layed out. I got talked into applying color over a primer that had some areas that were very thin (lighter color showing). I had to apply more color to get it to hide the primer see thru. I'm using a pearl color dark purple.

I'll be finishing it all in the next couple of days wioth the 2-1 clear applied per your recommendations.

And Man do I like that HVLP gun! SOOOO much nicer than the typical touch up gun.

THanks

You are going to make me blush...

>You are going to make me blush...
...only if you're all wet...