I learnt recently about this stuff you put on walls before plastering, its basically PVA with sand in it, revolutionised my plastering, not only better adhesion but your able to work the plaster harder in my view.
Anyways, i was painting my back steps a few weeks back, thinking they would be too slippy in the wet, so i painted this stuff on first a) to firm up the loose paint and dust b) to provide a grippy surface. Im basically using it as a test for a garage floor, although i would need to patch the dunts and holes if i went the concrete and paint way.
Benefit of paint would be i can do it bit at a time i guess, do the front half, move everything back, wait for a week and rotate.
And JD, we had mega expensive windows fitted in our house, so i got a decorator in to paint the surrounds properly, 1 coat of primer, 4 coats of undercoat and 1 topcoat, sums it up really, prep prep prep.