Yes lacquer gets its adhesion from the solvent penetration , but if hes having a lifting problem , sealer isnt always the answer either , Its why I asked what products he is using , hard to solve a problem if you dont know all the facts .
If he is using incompatiable products , he will never solve his lifting problem !


Lacquer is what is called " ThermalPlastic " material : it will Re-flow when exposed to heat or thinner .

Catylized Paints/ Clears are " ThermalSet " which when dried "will not" reflow to heat or thinners.

SprayTech