as a person that has used 2 gallons of herc... heed this advice...
1) dedicate a LOT of time to prep work... the coating will only be as good as the prep. Just like has already been said, use acetone, scuff, use more acetone, make sure its super clean/dry and then apply the herc.
2) wear elbow length rubber gloves. This stuff will stain skin a few layers deep and it will NOT come off for days unless you like digging chunks of flesh out just to get rid of the black color. I ignored this advice and ended up going to college for 2-3 days with very black hands. lol! /forums/images/graemlins/wink.gif
j