A VRS (valve regrind set) come with every gasket required to remove the head, re-seat the valves, and re-assemble.
They normally come with valve stem seals for that purpose.
If your doing a complete engine that set will not be adequate.
No point in painting the block, you'll never see it. Plus you'll need to strip it and sandblast it. And a sandblasted block looks better than a painted one