When is it dry enough ?
15 - 20 minutes, or until it begins to lose the sheen.
Don't get on it too soon, or it will flatten out way too much.
Getting on it a little late is no big deal. It will just require a lot more pressure to get the 'knockdown' look, and the texture will dry with a tendency to sluff off hundreds of tiny bits of dried edge when you rub your hand over it. This can be quickly fixed by wiping down the dried wall with a clean rag or just dragging a push broom over it.
It doesn't look as good when you let it dry too much before knocking it down, but it is still livable.
"True eloquence consists in saying all that is necessary, and only that which is."
François Duc de La Rochefoucauld
Last edited by Willie T; 03-09-2011 at 08:58 AM.