Alrite guys, im trying to find the best way to finally remove scratches which have gathered up over the years on my Punto Mk2b

There 3 main scratches;

First one is on the passenger front door panel


Second is on the rear bumper


Third is on the Front bumper


Ive tried using T-CUT color Fast on the door panel but have had no luck, I went down to the body shop to get a quote and they said £150 to spray the scratch firstly and then to Lacquer the whole panel. However I am in the process of currently about to colour code my wing mirrors so have already bought colour matched spray (from Halfords) with a grey primer and clear Lacquer. Whats the best way to get rid of all of these individual scratches.

Any advice would be much appreciated