stevensivak

Our cars were painted with oil based finishes....

Many painters are using water based paints...
I have heard some say that these modern paints should not be used, or may not
produce the best results.

What are the facts here, not the opinions, regarding the "best" paint for our cars?

Todynot

I don’t have any knowledge on this topic, but if you don’t trust the opinion of your painter, maybe you picked the wrong guy from the start.

pp000830

Some info on the subject:
https://993servicerepair.blogspot.co...-big-deal.html
Hope this helps,
Andy

stevensivak

Not that anyone here seems to care, but an informed source has stated that porsche stop using
Glasurit in 1992 and converted to PPG water based paints from that point forward.

So if this is true, why would anyone use an oil based paint on the repairs for 993 cars?

pp000830

It is not as simpe as automotive finishes are much more complex than being oil or water-based like house paint.
A little information:
https://www.hotrod.com/articles/hrdp...erborne-paint/

The paint industry has adopted the environmental mantra so there seems to be very little information out there concerning the comparative durability and finish quality between the new and old formulas.

In a controlled environment such as painting new steel in an automotive factory is a bit different from painting in a local body shop or even at home without a spray booth. The older formulas cover nicely and dry quickly reducing the opportunity for artifacts to get into the finish before it dries.

The newer formulas of base coats need longer drying periods requiring extended time in a controlled environment. My understanding is the only the primer and the color layer in the newer formulas two-stage process have H20 in their formulas to reduce volatile percentages. The clear coat does not.

On our older cars with single-stage paint such as the non-metallic solid-colors found on our cars, I do not know if paint meeting the low VOC standard is available and traditional single stage paints are the answer if one does not want to mix paint types on their car when painting just a section.

Andy

stevensivak

While some of the solid colors are single stage, they are all PPG water based formulas. The switch was made in 1992...
and was fully implemented by 1995.

So if you want to have a paint product that ages in a similar fashion to that which is on our cars, you would not
use oil based paints.

Obviously, you can put whatever you want on your car but oil based is not what you have....