I posted a while ago about painting a van silver. I am going to paint my car black, but the weather hasn't been good enough when I have time.
I haven't read the pposts since last time, so hopefully this is helpful! I just painted my 33 foot Winnebago silver. I rolled it on straight, until it started hardening, and added Interlux brushing liquid as needed. I'l put up "after" pictures later.

I did my van the same way, about 10 years ago, and the paint survived 5 wrecks, imcluding the one that ended the life of the van with flames. It never faded, or came off, and even stayed on the exhaust pipe, just as shiny as the rest.
It went on thick, of course, and the Orange peel looks like it would if I were a bug, but it levels out quite a bit. The paint is thick enough that I can buff it out. I buffed the van to the point that it burned my eyes (it got annoying). It reflects heat amazingly well, and seems to harden to a coat of aluminum. I'm going to buff at least one part, to show you guys, but probably not soon, since I'm taking this to the high Desert in about 1.5 weeks. This is the ultimate paint for this purpose.