You can safely remove the adhesive without ruining the gel coat by following these steps:
- Pull up the Hydroturf/Gator grip
- Spray leftover adhesive with WD-40, let set 45 minutes
- Scrap off adhesive residue with a dull edge (credit card, etc)
- Clean remainder with Acetone (wipe on, wipe off immediately).
I have replaced the matting on my swim platform twice using the above method and it worked great without ruining the gel coat. The above method came straight from Skier's Choice.