Shooter999
TF
Something like this:
Grinding cup
I can not stress enough how messy this is, tape up gap around door, wear MASK, EYE PROTECTION & GLOVES!
Go tentively at first to see how much pressure to use, you WILL tear up the ply if you're too heavy handed!
If you've never used a grinder I'd suggest you give Geoff's idea above a go first, soak the adhesive with water and use a bladed scraper, not a paint scraper.
Bladed scraper
Thanks for the prompt reply. I'll give the scraper a go first.
Cheers.