What should I paint my radiators with? Just stating a fact
Most of our radiators are painted with cellulose or acrylic car spray paint, there is no need to use expensive specialist radiator paints - car paint is designed to cope with extremes of temperatures and be tough enough to withstand a great deal of abuse. Emulsion paint can be used, but the finish tends to not last very long cracking and peeling are common problems with using emulsion.Powder coating produces a fabulous finish, BUT... the radiators are not designed to go through the prolonged baking process 9 times out of 10 all will be well, but especially on old cast iron radiators the paper seals between the sections can be damaged, replacing these is a very hard task. If you want to powder coat a radiator find a powder coater who uses a low temperature baking process.
A similar looking end result to powder coating can be achieved using products like "Plasti-coat" a spray paint available from DIY stores.
You should use radiator clearcoat on top of normal paint unless stated on the tin that it can be used for rads