Do u mean heavy iron 1.0 and 2.0 and his arm cannons? I'm not sure what materials I should recommend cos I jst use bit n pieces lying around , basically any old bits of plastic , but rinse them first otherwise it won't glue and take the paint properly
Awesome, I have some creating to do now (Megatrons shotgun, sideswipe and ironhides guns, an accurate gun for my optimus....)