QUOTE(SolFire @ Dec 18 2008, 03:37 AM)

I've never actually owned G1 Whirl, so grain of salt. BUT, I've had plenty of TFs with ball joints. The best and most effective method I've used to tighten these joints is clear nail polish. It increases the size of the ball without damaging anything. One or two coats (with sufficient drying times) does wonders. Only on the ball part of the joint, of course.
You can get shiny or matte finish too, depending on what you want the toy to have.
Cooler. Thx Kev'