Just joined the forum, This is a great topic and I have done a few cars with roller and spray on before. My 70 Duster had just about every color tremclad made. One note you cannot paint over the Aluminum paint. Anything applied over this will peel off badly.

The last post refering to the "stock paint" and painting over. As long as all the loose paint is properly removed and you properly prep the surface you can paint right over.

I've sprayed about five cars with tremclad and seems that the thinned paint is very important with that process as well. Like has been said before the R&B method is less dust and less stink which is always nice.

My newest project is an 82 scirocco that I've reserected out of a wrecking yard here in northern alberta. Body work almost done and I'm going to start laying on the paint very soon. goin to go with the Med Blue gloss as it is close to original color. I was browsing at Can tire and they have a Base Tint with about 50 different color variations
anyone try that yet??