Good old supermarkets!
Re sorting it depends how deep the scratch is? If its not all the way through the paint try a medium polish on a proper polish pad like a sonus if you havent a rotary. Go careful though!
Another thing to try and it sounds daft so bare with me!
Clean the area first, use your touch up stick and poor a little paint into a piece of folded kitchen roll/paper then apply to the area.
Dont go mad and spread it everywhere just in and over the gouch/scratch area. Leave to just about dry then carefully polish off the area again.
Do this several times until the paint has built up, then leave for a week or so and go over again with a cutting polish, carefully!!
Sounds daft but worked for me several times on scratches etc when unable to use a porta etc.