Does surfacing wax have a shelf life? I have some that is about 1.5 yrs old and am not sure if I can still use it.
Yes Surfacing Wax will go bad after time since the styrene evaporates. Also prolonged exposure to heat and light may affect it. If there are chucks of wax floating in there you add more styrene and heat up the bottle to re-liquify the wax into the solution. It's also a good idea to strain it to get rid of any pieces of wax that did not dissolve.