Hello, once you have used T-cut on your car,do you then use a good quality wax,if you don't then you need to,as the wax protects the paint and will stop the rain from washing it away,it is important to wax as T-cut is a abrasive and thins the paint slighty to blend the scratches,hope this helps

Meguires swirl x or scratch x depending on the depth of the mark

give the car a good wash with a decent shampoo of your choice

claybar the whole car

then apply either of the above over the area's in question

give the car a coat of autoglym super resin polish

and then top that off with at lease one coat of wax of your choice prefferably 2 coats due to the weather conditions atm

T-Cut's full of filler and doesn't actually remove the defects - hence the re-appearance of the scratches. The best way is to use a dual action polisher or rotary polisher and a proper compound. Or use an abrasive which can be used by hand (athough it takes ages when working by hand!)

Thats your best bet for a DIY job, the clay bar is brilliant,my paint is like new,nice and smooth,give it a go, I spent weeks deciding if I should do it or not and i'm chuffed to bits,only down side is it takes nearly 3 hours to do a whole car

If the overspray is sitting on top of the existing lacque, clay is ideal for this.