If anyone is interested to discuss the Argus, the blog was mine. The aircraft were originally bare metal. They were corroding too quickly so by about 1960 they were painted a light Blue grey. By late 1960s they were painted FS 501-109 blue grey. You can reach me at planesandtrains@gmail.com if interested. I just ordered 3 Mach 2 Brittanias but I can't fine the AIM conversion kits (of course...late to the party). I sent AIM an e-mail. We will see what happens. For the interested, I have illustrated the Argus book by Baker/Campbell too. Cheers! Rob