Flex Hone

If you check out the Brush Research Manufacturing website the can give you a lot of suggestions to what type of stones & grit to use. I think you are good with the silicone carbide. Grit is really gonna depend on what type of rings you are going to use. Cast rings usually use a 240 or 320 grit, moly rings will need a finer finish, 320+. If in doubt use the finer grit. Use the BRM honing oil or SAE 30 wt motor oil. WD-40 & other lighter oils will cause the bore to overheat & gouge the surface. The stones will just tear at the bore rather than cut it. You can't lube it too much. So use plenty of oil. Dont expect to remove much bore taper with a flex hone, they're not intended for that. Final finishing or deglazing they work fine.