Cheers Dombooth, iLeno: I bought cc'd standard bumpers and on the back you can push the clips out, You do need to unlock each clip and push! Then a good rub down with the green side of them cheap kitchen sponges you can buy (where one side is sponge and the other rough)
Sprayed the sprips with primer, gloss, lacquar. 2 or 3 coats of each.
The main white bit of the front bumper I masked off, rubbed down and painted in the same way.
Wait for the paint to dry properly before removing the masking tape and pop the strips back in.
The rear bumper strip comes out as a whole then push back in. Trickier to push back in than out