The pre-catalyzed lacquer is amazing.
If you know your chemistry, you understand that lacquer dries but never cures. It will forever be reactant to solvents. This is why harsh cleaners, alcohol or even standing water can damage your nitro guitar.
Pre-cat lacquer is a two part deal. You got your lacquer and you have a catalyst.
When you spray the stuff, it behaves exactly as you’d expect it to. Lacquer thinner is still the solvent. It still dries to the touch fast and is easily sanded. You can overspray or do touch ups and the new will melt right in like you expect it to.
After about, 60 days, however, the molecules cross-link and become non-reactive to solvents. It will no longer melt with lacquer thinner or anything else I’ve seen. MEK maybe but that stuff will eat anything.
Downside is cost. $85 a gallon for the lacquer and $60 a quart for the catalyst but that quart will catalyze 20 gallons. By comparison, a gallon of Hi Bild nitro lacquer is less than $40.