What is the secret to paint not coming off at the joints?

There's never a "right" way to do anything. I don't disassemble anything for myself, I only do it for commissions or ebay. I take apart the body so I can sand the inside of the shoulder-sockets, then if I feel like it, I grind down the shoulder-disks (like Buzzy says) to eliminate the rubbing there. I pop-off the arms and legs so I can paint the hips/shoulders better and coat them with super-glue so they don't rub when I turn the arms/legs, then I pop them back on. Elbows and knees I don't care about, I just paint them and put superglue on them carefully with a needle so they don't rub.

I don't know why it's not in the tutorials section, but I made a tutorial on it, I'll get the links...

http://www.figurerealm.com/phpBB2/viewtopic.php?t=13292

Ok, another question regarding joints and paint.

What is the best method for painting; totally disassembling the figure and painting each piece then putting it back together, or leaving the figure totally intact? I kind of used a 50/50 method where I pulled off the head and limbs, painted them, and put them back on. I'm having mixed results with that. Should I be breaking the figure down further into knees, elbows, hands, feet, etc?

Thanks!

there are a few ways to solve this sanding down the joint and then painting over it or after painting seal the joint with a thin layer of superglue