I've put the stripe decals on the body and found what looks like hard water stains on the black decals. I don't want to mess the decals up but how do I get rid if the stains? So far I've wet a Q-tip with plain water and gently rubbed it. Didn't work. Tried the same with a spritz of windex on a Q-tip. Didn't work. The stains are not real visible but they are there. Any ideas? Thanks. And when you do the body decals on this kit, if you can figure out a way to grow a third arm/hand it sure will help.