At £100 its a bargain!
It's a good bit cheaper than what you'd pay in the bodyshop I work in anyway. If it's someone doing it as a homer it sounds fair, if a bodyshop was doing it for £100 I'd be inclined to say it'll be sh*t.
If it's from an actual body shop 100 quid is o.k really. Mobile repairs end up in tragedy half the time. Silver can be a tricky colour to blend
That would make me nervous... Lol
Just read your thread properly and realised it's a mobile paint company, DO NOT use them, if you're skint wait a bit and save a little more cash and get it done at a proper bodyshop.
If it was me, i'd get as much of that out as I could with some wet and dry and a good polish. It will look infinately better.
For a start £100 is expensive for a mobile guy. (My bloke charges me £35 for a bumper corner)
And mobile people are nowhere near as good as a proper bodyshop.
dont really want too get stuck in just incae i screw it up but its only the odd bit that gone right through to the plastic