"I need to make a lip on the panel at the top and bottom so would need to join some new fibreglass to some old already hardened fibreglass. Do I just go right ahead and lay the new fibreglass on top of the old stuff? Will it bond nicely?"
OP seems to be a bit confused as well............. maybe not the type of job to get involved with, unless you enjoy lots and lots of hassle for little money?
OP seems to be a bit confused as well............. maybe not the type of job to get involved with, unless you enjoy lots and lots of hassle for little money?