how to repair a plastic bumper?

[stevenM]

hi folks

i have some cracking on my bumper around the exhausts (after an unnoticed blowing exhaust and track day session for some heat!).

a small area actually broke away, i built it up from behind with fibreglass and covered in filler but of course as the bumper flexed the filler has cracked around the edges.

i've heard of plastic welding but if it's to be fixed by DIY is there a method / product that is ideally suited for this?

cheers
steven

[tlracing]

Have a look here:
http://www.pistonheads.com/gassing/topic.asp?h=0&t=486382 

It's quite easy (with a bit of practice)