It's Rustoleum's Aluminum Paint... It's VERY thin, not tick, and covers well. I tried to brush it on... But you have to make it REALLY thin (dry brush) to get rid of brush stokes. I did the back the first time by brush. Then I rolled it - that gave it the galvanized sheet metal look.
I'm doing a "Royal Blue" for trim beveled in the middle... and block for the bumpers and bottoms.
I'm doing the top in white - that way it's 'energy efficient'.
I removed decals, WD40 to remove the sticker glue (let that sit and hit with a drill's wire brush - that was the easiest). Sand the exterior with 150 grits paper, and rivets/beveled areas got wire brushed with drill. After that, everything got rag washed with acetone then painted.
The base coat is aluminum, then blue and black. It's all oil base so keep a mineral spirits rag handy. I accidentally dumped about a quart down the side when I started. The aluminum is runny like water.
the mineral spirits also does wonders or removing roller speckle from the windows.