CW,

I've had good success painting Monokote but the trick is preparation and using the correct paint.

I use Rustoleum in the spray cans exclusively. If I had an airbrush, I would still use Rustoleum.

Preparation includes taping the borders of the area to be painted and for that I use the 3M masking tape. Most people use the blue colored tape but only because they may not have heard of the green tape. The green tape is designed to not leave residue when you pull it up AND to not pull up paint to which you may have taped it. It's as effective as the blue tape in creating a clean, tight border.

First, rough up the surface. I use steel wool but sandpaper will work fine too. Make certain that the surface to be painted is absolutely clean. I use alcohol immediately before painting to be sure there's no oily residue.

Prime the area to be painted. If you don't prime it, your paint won't stick. Period. Use Rustoleum automotive gray primer.

Next, use Rustoleum spray enamel in whatever color(s) you want. Then forget about your model for at least three days so that the paint will thoroughly cure. It's critical that the paint be totally cured and that the painted surface remain clean. Don't even touch it.

I assume that your .60 size ARF will be powered by a glow engine so you'll want to put a good coat of Rustoleum Crystal Clear over the painted surface. I believe you can get the clearcoat in a matt finish so that your camo scheme will not be shiny.

Good luck. Post a few photos when you get done.