Ive got two areas with rust that I think needs sorting asap (also some on the wheel arch lip), Ive been quoted £300 each side which I think is a tad steep especially as I was told it could be more depending if the rust goes through or is sat below the black strip. SO the question is, is that a decent price or way off the mark?

I would have a go myself but really never done it before and dont want to make more of a mess lol