On Jul 15, 12:02 pm, "charlie"
wrote:

look for spray varnish or lacquer in the same place you got the original
paint.

Mind that you get a water borne acrylic. There are artists sealers
that are water based and used specifically for sealing as the stay
clear.

If you put solvent based on the latex it will stick well, but since it
is white, it will almost certainly discolor it (yellow, amber) it.
And as with all solvent based products, it will only get more of an
amber hue as it gets older.

Robert