Just thought I would throw an update on here. After much debating with myself. I decide to have a body shop paint the Alfa with urethane base clear, not because this method isn't a really great cheap way to paint a car, but more because I think I'll probably have this car for a very long time and I decided it deserved the very best. I did finish the trunklid, it turned out way beyond anything I imagined. Certainly makes the car much prettier to look at while I save for a real paint job. Anyway here it is:
This took maybe 5 coats of Rustoleum "Stops Rust" rolled on with a white foam roller from lowes (well several rollers actually).
Before polishing final layer, had a few runs and some dust flecks in it:
Final coat after polishing:
Here's my final opinion, and some things I discovered along the way. It looks pretty good, but not the same quality that a base/clear or a good urethane single stage would be. I finished this back in July and after sitting in the sun it still looks great, but it is just slightly duller now and when you polish it, LOTS of black comes off on the bonnet, or the cloth so im thinking it would be polished through in a matter of a few years. Also its extremely difficult to not make it really thick in areas like door jams and cowl vents using the foam brush and roller.
A lot of people mentioned that this technique takes a lot of sanding, but compared to sanding automotive paint, this stuff comes off really easy, you can probaly sand the whole car in about 20 min by hand. I'm sure if I had painted the entire car with the stuff, I could sand it all down to the original finish with the D/A in about an hour, which is another thing that makes me believe this paint is nowhere near as hard as urethane auto finish. But on the plus side if you think it would cause problem painting over, it's really not that bad to remove. I've spent a whole day wet sanding urethane before and not been done yet....speaking of which I discovered something else along the way:
YOU CAN USE THIS ROLLING TECHNIQUE WITH URETHANE AUTO FINISH AND IT WORKS GREAT!
I rolled House Of Kolor base and clear, that had been reduced and catylyzed, with this same technique on my boat, and it works really well and looks great! I also rolled some of the clear over the rustoleum on a test panel which has been sitting out in the sun for 3 months now. It looks the same as the day I did it. No fading. No adhesion problems.
Rolling this stuff does have the disadvantage that it smells really bad compared to Rustoleum and I wore a respirator (nowhere near as bad as spraying), but it has the huge advantage for home garage use that there is no overspray and way less dust problems. It goes on with a bit more orange peel than a good spray job, but it's easily sanded out. If you reduce it a bit more than you would for spraying, it self levels just beautifully, and the shine is fantastic! The only real disadvantages I found are the aforementioned tendency to pool in crevices, and the chemicals in the HOK paint tend to start disolving the rollers after about 15-20 min, so you have to work fast and change the roller maybe once per coat. I plan to do this using House of Kolor white on my daily driver/beater Celica All-trac in the next few weeks and will post pics if anybody is interested?