scrached bumpers

well i have spent alot of time bringing my car to almost showroom condition but just have a few last nigles to sort out one of wich is slight scraching on the black plastic bumpers and was wondering if anyone has any tips or tricks on how to make them disapear they are quite deep and can be felt when i run my fingers over them i have tried heating them up to try and get the dispslaced plastic to setle back to it's original place and had some sucsess but they are still visable and i cant think what to do with them i thought about sand paper but decided this whould make the hole are look rougth and less black so didnt try it

to see my car as it is have a look here
http://www.fiatforum.com/members-mot...mk1-punto.html

thanks in advance

TBH the easiest way is to rub em down and spray them either body colour or black if you want to keep the OE look

are well will just have to keep my eye open for a tidy bumper in the scrapys then