there several ways i do it. i have a saulder gun so i use that for saber burns but make sure it's painted so the paint looks burnt. for bullet holes a heat up thin nails with a blow torch until its red then puncture where i want the hole then put a thin layer of black paint on the melted ring to give it good affect. to do weathering i bought a set from pakatans for like $50. the have really odd colors in it the resemble dust, rust, etc., but they take a while to dry