The answer is no, General Finishes Milk Paint does not require sealing, especially for lower use pieces such as a coffee table.
We named our product Milk Paint with the intention of putting a clear, bright, contemporary spin on an old fashioned furniture paint tradition. With that said, GF's Milk Paint is not a true Milk Paint as it does not contain any milk powder.
There is no easy solution to this problem. General Finishes Milk Paint has strong adhesion properties but there are several reasons this finish could fail:
To prep an existing fiberglass door that has a coat of paint on it:
Should I use a topcoat or a wax over my paint or stain finish?
The GF gang gets this question all the time.
ANSWER:
It depends! Read on, or watch this GF video demonstration: http://youtu.be/torOAQy91q4
*Here are the main questions to ask yourself: