do NOT! use nail polish to tighten your modals joints. case in point my F91s hips are stuck and nail polish remover has made it worse! and I just got done repainting it with neon glow markers so pretty FUCKING LIVID at the moment and had to drop another $45.00 on amazon just to replace the fucking hips. another shitty week in this shitty month YAY FUCKING ME!