I want to paint out a radiator. It's just a standard newish one, that's already painted. Do i need to sand and prime or can i just go over it with my wall paint? (The wall paint is regular Crown water based vinyl matt emulsion).
I don't think you need to sand as its already painted, effectively you are just changing the top coat. You can use radiator paint or eggshell, matt emulsion is really just for walls and won't wear so well so if I were you I would opt for eggshell