I spent a full day grinding and prepping for new wood, after using detergent and the hotsey to remove all the great and old nasty gunk. Lots of carpet adhesive slowed progress, clogged up even 18 grit disks. This was done with halves separated, I would imagine it would hamoer efforts when the top is still attached. Clean and roughened up should allow the new resin to bite. Not certain if different resins are available that adhere better in certain applications. Looks like good progress, next year launch?