RE: Break-in a rebuilt engine?
All:
We have a misused term here folks. "Honing" is to cut metal from a cylinder bore, and bring it to the finished size. Unless you are doing an overbore, and installing a piston of a larger diameter than the original, honing is a very bad idea.
"Glaze breaking" is an entirely different thing, and is highly recommended before installing a new ring or rings in the original bore.
If you are using a "Brake hone" one pass up and one pass back is all that is needed. Using 400 grit paper with oil will do it in 30 seconds.
It is not necessary to cut any metal out, and it is a bad idea to do so.
If you can see even the mildest of scratches added you have done enough. Any more is artificially induced wear, shortening the life of your overhaul and making cylinder sleeve replacement that much nearer in your (and the engine's) future.
Bill.