Plastic welding and whats the best body filler for plastic?

[tommygti]

Im smoothing the bumper covers and ed30 splitter on my mk5 gti bumper. Ive done plastic welding before so I know the basics. I need to know what plastic material the bumper is made of (i know it says somewhere on the inside but it has not arrived yet so I cant check!) as the covers I have bought are made from ABS so im not sure if they will blend together properly?

And what is the best body filler for plastic? I have used halfords ISOPON filler which is good for small jobs but not big ones.

Cheers

[felix!]

if the bumper is black on the inside (the raw plastic) it will plastic weld, if it is a yellowy beige colour it will not plastic weld

when smoothing bumpers i use a flexible bumper filler, upol do a good one