whats the best way to smooth out the xr2i bumpers where the buper stripes go , i know theres filler and fibreglass but is there any other products that are better , i dont really want it cracking after a few months

 

I did this on my series 2, and you can get some flexible filler, not sure what its called, the bodyshop gave me a tub.

(not very helpful tho)

 

i smoothed both front and back bumpers on an orion once , i used a flexiable filler, never dropped out or cracked.. and that car was on the floor aswell..

 

You can get a filler that has kevlar in it,
To be honest use fibre glass filler then a mix of 50/50 fibreglass / normal filler then finish with normal filler,
Ive done many of my own cars and customers with success every time

 

Cool cheers , may have to give that ago