Tutorial credit goes to TFW2005.com member, jasonmako. Thanks for your contribution! So today I bought a mint Bombshell Insecticon to re-paint. After looking him over, there was absolutely no correct way to paint around the arm joints with out taking the pins out. After deep thinking about what could be used to support the underarm without ruining the design or plastic, a light went off and Sculpey III was the answer. Its hard yet soft, conforms to the plastic pieces, and will take the impact of the pin being hit out. The Right Arm: The Left Arm: The Left Arm Pin: Hope this tip helps you with those non-flat parts. (In the original discussion thread, there are some comments that add additional information for this modification; they are included here for additional help. ~Superquad7) I've kept mine open in the fridge since i made the post and its still good!