A previous occupant stuck some large white plastic hooks to the uPVC
window frames with what looks like a load of double sided tape and some
old yellow brown adhesive. Possibly evostick or similar. It is very old
Any ideas on how to remove it?
I have cellulose thinners in the garage but suspect they would damage
the uPVC. (I think my angle grinder would do the same!)
TIA for any advice.