collision repair and auto painting

[bmwstephen]

Oliver,

do you have any recommendations for over-the counter undercoat paint that can be sprayed or preferably roller-ed on? There's some areas on the pinch-welds/jack points on the car where metal is exposed and the factory undercoating is peeling away

[oliver.r]

Oliver,

do you have any recommendations for over-the counter undercoat paint that can be sprayed or preferably roller-ed on? There's some areas on the pinch-welds/jack points on the car where metal is exposed and the factory undercoating is peeling away

best stuff i have used is no longer on sale in CA because of VOC regulations but SEM makes really good rubberized undercoating.
you will most likley have to order it online.
duplicolor stuff you find at pep boys and such is terrible

[bmwstephen]

best stuff i have used is no longer on sale in CA because of VOC regulations but SEM makes really good rubberized undercoating.
you will most likley have to order it online.
duplicolor stuff you find at pep boys and such is terrible

do you happen to know the product name or do u use something different when doing this at the shop?

[oliver.r]

http://www.autotoolworld.com/product.asp?itemid=169393&gclid=CKrr65yX7bMCFcaDQgodDXoAKg

thats the good stuff

[nmlss2006]

I'm not Oliver but... the original stuff is from Wurth, the original formulation is NLA because of VOC concerns. The present formulation is available both in aerosol (to be avoided) and, closer to the original, in a can to be shot with a Schultz gun. You can get a cheap version at HF for $6.99, btw.

[bmwstephen]

I'm not Oliver but... the original stuff is from Wurth, the original formulation is NLA because of VOC concerns. The present formulation is available both in aerosol (to be avoided) and, closer to the original, in a can to be shot with a Schultz gun. You can get a cheap version at HF for $6.99, btw.

why avoid the aerosol version?

[nmlss2006]

Well: it doesn't lay the same way (the HF gun is also... less than ideal, but better) and apparently the formulation is even lower in VOC -> worse results. If you google you'll find various Pelican parts / Porsche forum posts discussing the various alternatives. I can say I've seen the Schultz gun version and it looks like the factory finish (because it is, essentially).

[bmwstephen]

Anything u can possibly roller or brush on? The exposed spot is on my car's under carriage

Sent from the heavens

[oliver.r]

you might have to import something from out of the US.you cant buy anything with high VOC in CA, stuff even tho stuff with high VOC is by far the best it is terrible for your health.
if you want to do a roll on i would just do truck bedliner

[bmwstephen]

Oliver, with waterborne being a totally different beast in nature. Is there a time limit for a painter to paint the clear coat over it? I know with traditional solvent, the flash time is 15 mins after it drys to ensure adhesion.

My understanding is that waterborne dry's flat and sating but can become soluble again once you run water through it so where do you draw the line?.

[bmwstephen]

beep

[oliver.r]

Oliver, with waterborne being a totally different beast in nature. Is there a time limit for a painter to paint the clear coat over it? I know with traditional solvent, the flash time is 15 mins after it drys to ensure adhesion.

My understanding is that waterborne dry's flat and sating but can become soluble again once you run water through it so where do you draw the line?.

there is no time limit to put clear on it. the biggest reason to put clear on it is to keep contamination from getting on the surface.
waterborne and solvent based paint dry flat. and just like when you put thinner on solvent paint the same thing happens with waterborne and water

[bmwstephen]

there is no time limit to put clear on it. the biggest reason to put clear on it is to keep contamination from getting on the surface.
waterborne and solvent based paint dry flat. and just like when you put thinner on solvent paint the same thing happens with waterborne and water

so you can basically wait a few months and still apply clear with no issues? I know some painters like to sand their bases prior to clear.

[oliver.r]

the only reason you would sand the base is if it had contamination THATS IT, more paint need to be applied afterwards or you will see scratches on the paint.

you could wait months if you wanted but why?

[bmwstephen]

the only reason you would sand the base is if it had contamination THATS IT, more paint need to be applied afterwards or you will see scratches on the paint.

you could wait months if you wanted but why?

very true. I was curious what sort of options painters have to correct mistakes. Say for example an area of overbite on the body was looked over. It would be more feasible for a painter to touch up that area than to completely do a respray