probloms my rear calipers are binding whats the usual suspects?

[s12-newbie]

the ghetto grinder is the only way on a street car, i dont use tha car that much at the moment due to fuel costs but i am using cut springs as it rides smooth still & looks cool & my lil mini race car is enough bumpyness for me LOL

how do i remove the hubs to change to longer studs as i found some good spacers which should allow enough clearance for my 14" rims, any whoo i have gone of topic a bit

i'm doing the brakes on my silvia this week, i have the calipers partly off, but i have to refit them to unbolt the handbrake mech, a 14mm one, & i have to slacken the hand brake, where is the adjuster?

the springs etc on the rear caliper are moving freely now

how far can i pump the pistons out? i dont want to remove them i'd like to pump them out a little to see if they are pitted, the drivers side rear is fine the passenger is a lil suspect

the carriers i have cleaned up with a wire brush on a drill & painted them matt black, as with the bolts! bolts are covered in copperease grease!

i have new pads for the back replaced the fronts & once i've done the rears i'll bleed the fluid through as its probobly due a a change

binding or siezed brakes are a pain in the arse! but....... i want to get her on the road with a fresh MOT

cool blummin car ya know! lpg in this thing would be nice if i had the funds, we'll see