I am in the process of fixing up a 1965 17' Starcraft. It has a plexiglass "bowed" windshied that is pretty foggy to look through. It also has some hairline stress cracks along the bends to the sides of the boat. Does anybody know of any way (or cleaner/solvent), that will solve either of these problems? I have tried nothing on the cracks. As for the haze, I have tried common things like windex, alcohol, purple power, etc. There has to be some kind of good cleaner out there...Thanks in advance!