Assuming it's baked: minimum is one month, optimal is three months. After much

MirrorFinishMan contacted all the major autopaint manufacturers for the straight info- and yeah, you should wait.
I wait at least three months, sometimes a good bit longer. I use something like 3M IHG or
Meg's #3/#5/#7/#81/Deep Crystal Step #2 in the meantime after every wash. FWIW I prefer the Meg's #5, very user-friendly.
If you wax too soon the paint won't reach maximum hardness but it won't cloud/peel off/suffer catastrophic failure.