I'm not modding, I'm improving
Please don't use T-Cut!!
If it is a very light scratch then something like Auto Glym Super Resin Polish (AG SRP) should sort it for you. Same action as any other polish, small blob on a micro fibre and polish in.
If it is a bad scratch, Meguirars Scratch X is very good. But this is more of a harsh polish than SRP, so go easy.
The only other option would be to find a local detailing with a machine polisher. I am based in the NW (Cheshire) and would be perfectly happy to help. If you could post up photos, that would help greatly!