[Heathkit] Paint gun for boat anchors

[Richard]

FWIW - I use an airbrush and a CO2 tank like is used for soft drink mixes.
I'm not sure what a tank costs anymore (this one dates back a couple
decades) but refills are very cheap at an industrial gas supply.  No
compressor noise.  It takes a little more time to paint a panel but then I
have the advantage of fine adjustment of droplet size, rate, and mix.  And I
am not limited to to the colors in a spray can.   
 
One handy thing that I found when painting aluminum is direct-to-metal
paints.  They can be custom mixed and adhere well.  YMMV
 
73 de Richard W5SRB