Reply to "Clutch Slave"

There are no seal kits for the master OR slave. You may be able to use parts of a FIAT kit, depending on the year of your car. Honing out rust pits is iffy; if the pits are too deep, the seals won't seal after all your work. Too late for the clutch, but the best solution is to change brake & clutch fluid yearly so the dissolved water doesn't rust out the bores. Second-best is to buy a stainess steel replacement slave cylinder, long-throw style. Then, you get a rustproof slave that disengages the clutch better than stock, which is better for the transmission synchros. Incidently, the clutch master cylinder probably also has pits; they tend to go out in lockstep, being part of the same assembly with the same contaminated fluids inside. And, it may pay dividends to drain & replace the fluid in the brakes.