doing this yourself is tricky but if you are carefull you can do it m8 ring porsche dealer and get the seals and carefully remove the old seals and pistons also remove the bleed nipples ends and you might need to remove the bar that runs from one side to the other with the rubber bit on as not sure this will take the heat when powdercoated all parts can be bought from dealer for about £70 if you need new shimms they are around £8-10 per set.
make sure you cover the holes where the pistons go and the bleed ends at each end as you dont want paint in there.
if you really get stuck try daveb on ukmivs he is brake guru
hope this helps you. i have just done mine but not powdercoated just hammeright blue 3 coats
