Originally Posted by MARTINSR
If you don't do this the solvents in the paint or clear that you are applying can get thru and under the thin clear that you have applied and lift it.
Could one also shoot a few more coats of clear on the areas that might be thin and THEN scuff? I've heard some horror stories about reshooting base over thin or "sanded through" clear and the lifting/wrinkling that can occur.
[Edited after re-thinking] I suppose this option is out if the "window" has closed and the clear is too dry. Wouldn't the clear then have to be scuffed just to shoot more clear...which puts you right back in the same predicament.