There are no naive questions. Just ask.
No, thats not possible. The holdover time is expired when the time is over. These times are given for light and medium precipitation rates. It is also over when there is accumulation of snow or ice on the wing. Both cases require new deicing.
Besides Anti-ice is like gel, its liquid. There is no "dry snow" on a liquid gel. It will be wet and has to be removed again.