Painting MDF skirting board

Hi. If it is primed there wont be a need to use a specialised primer (un- primed mdf does) So you can paint the same as you would with any primed or previously painted woodwork. Try to stick with the same paint system. I.e water based undercoats and glosses/eggshells. Or oil-based u/c's glosses etc The only consideration is if there are any areas that have been prepped. E.g filled(mitres/screw holes) and then abraded. Usually the abrading can take away the primer coat leaving un-primed mdf. These areas will need a little more attention or they may be visible in the final.finish. Really they need re-priming, and its likely that some 'furring up' of the mdf particles will occur. So once the primer is dry sand smooth with 180 or 240 grit sandpaper(on a block best)

Most water based undercoats are ideal as a first coat on primed MDF, then add which ever top coat finish you prefer. I like to use satin wood. Kind regards,