hi guys. ive recently stripped my r32 calipers to have them painted and decided to replace all the seals at the same time. ive started to fit the seals and dust covers. but one of the pistons has made it half way in and wont budge. it will turn fairly easily but not come in or out. has anh one got any tips on this i can try? its really stressing me out so any help would be very much appriciated. thanks. daz