*james00112233: if by deep scratch you mean it it went thru the color coat and stopped at the primer, them a thick application of wax would already do the trick, if by deep scratch you meant it striked thru not just through to the primer but right through to the metal then i would recommend you have it done in the shop and have bondo put over it to cover the exposed metal to avoid rusting. In my case what i do is use a clear coat pen from a paint correction kit i got in the US from TW, its basically a clear coat on a pen so for those instance like small spots i just use this and wait for the wash over, but if its big then its definitely body shop already.