I've had the P-40, Spit., And P-39. We used to use them for dog fighting. The covering was to paint the bare foam. The biggest problem was finding a camo color that would not eat the foam. As we combatted we would reattach with glass and epoxy.

For power we used K&B .40 (before schnurl portting) My spit. had a Fox .25 BB and it flew it fine. You dont have to go mock 2 with your hair on fire to have fun!