i have resin inside my plug has anyone succesfully sanded or pulled, used chemicals to get the fins to fit in? dont wanna break them out if i dont have too
Try chipping it out, often it will not actually be bonded in there.
What sort of resin? Epoxy or PE. If epoxy, I’ve proven, to myself at least, the chipping method does work. Good luck.
Litte screw driver to cip it off if there’s just a little bit of resin.
If it’s full… it’ll be harded but try to remove the most u can with a small drill using tape to not go through the plug, then extract the rest with the screw driver.
There’s no chemical solution to dissolve the resin, no simple one at least.
Z.
I’ve done this more than I’d like to admit 
Carefully drill the resin to break it up then chip it out with a small flat head screw driver.