My 7/70 fj40 has the 7/8" bore wheel cylinders. I have a leaky cylinder again after doing a rebuild about 5 years ago. I am gonna go the same route again (clean up all the crap and install the rebuild kit) I don't feel like spending the cash right now on converting to the later model cylinders and or disc brakes. So my questions is, how much cleaning should I do? In the last I just used cleaner and wire brushed everything and then used a fine sand paper to smooth things out. Is there a cylinder hone for really get ride of the imperfections? And is a wire wheel too much on the surface. I don't wanna do too much and cause a leak. I figure it's just 5 years of use 4 of which my cruiser was my DD. Any suggestions of do's and don'ts.