Liquin as a Final Coat/Varnish

[AWaichulis (Anthony Waichulis)]

It depends—I usually wait 1-2 months at the very least. For more detailed info on this:

How long do I wait before varnishing an oil painting?

One of the most perilous realms of uncertainty in regards to painting is a timeframe for varnishing a finished work. Different sources communicate very different timetables. For example, Winsor&Newton states, "Try to avoid the temptation to varnish the painting immediately after completion. The colour needs to be completely dry and we recommend waiting at least three months before varnishing." Natural Pigments on the other hand, shares a more commonly touted timetable, “The best practice is to…