"Pete C" wrote in message
...
snip

Epoxy gives a much better bond than polyester BTW.


Little confused here, the OP was asking about 'gap filling' not bonding, the
original reply from 'Grunff' that suggested Auto body filler would be OK is
correct / if / it is gap filling that is required, but if the OP wants to
bond then Epoxy should be used.