Question to kitbashers or restorers. Is there a grease or oil that's safe to use on overtight joints? Normally unscrewing the screws a little would help but I just got a G1 Brainstorm whose hips are insanely tight and unfortunately aren't the screw in type. I tried taking him apart to see if I can access the joints on the inside but that doesn't work either. So I'm thinking the last resort is somehow oiling the joint. Some of my other G1 figures have creaky, overly tight joints as well but usually unscrewing the screws helps a little. Any ideas?