I am trying to get the old rear fenders off. Is there a trick to getting the 4 Phillips screws out? The won’t budge. I have hit them with WD-40 though it’s very difficult to get to the top side of the screw. Have heated them, tapped on them and they still won’t budge. All 4 on both sides appear to be seized up. Any hep would sure be appreciated.

Thanks!