^^^^
spend a bit more and get stainless as stated. Your apparently not meant to spilt them but I did. Go gentle - instead of a boot and circlip they’re a stupid fragile ring seal thing at the top. Easily kinked if heavy handed. I cleaned lot out and redid with new seals, pistons and assembled with red rubber grease. Careful you get the right ones. Fronts are longer than the back but think you told me that when I realized fitment was wrong anyway!
Might just clean the discs and hope for the best and wait until it's back on the road for the calipers, quite a chunk of work to do the calipers on top of family time, unless I just swap them out for new ones to start with and then refurb in the warm and dry of the front room.
Can't believe that the little one is a year old on Wednesday and has not yet been in it