Josh ,thanks for posting the images of the Pierce Arrow Travel Lodges for everyone to see. These were only produced for a short time in 1937 as an attempt to keep cash flow going for their automotive div. Approx. 400 total were made. Incidentally that did not work .The rivets I am thinking of using are in fact made by Micro-Mark Co. and are resin rivets raised up off the surface off of the sheet. They are a product made for model railroaders. The set I have is marked "O" scale which is the closest to 1/25th. There are lots of different patterns including single and double rows, and even some louvers. They recommend applying them then spraying a coat of paint over the top .FYI Archer Co. also sells some louver decals that are raised on the surface with resin.