dody,
It sounds like an old system coming back to life , and it isnt a good one .
A lacquer base under any type of urethane is a NON -repairable system. As lacquer is alot harsher and penetrates a urethane product , therefore lifting occurs.
Plus the Urethanes dont Bite real hard to a lacquer surface as it isnt formulated for it . ( I know all you old timers did it for years with no ill effects ).

Its why all the GM , Ford peelers , Chrysler 's of the 1990's , as they were trying to develop a fast BC/CC system and it was a lacquer type base , and it failed miserably !
Now its all compatible Acrylic Urethane systems .

I hated back in the day when a so called painter shot a complete with Lacquer , and then put Acrylic Enamel clear over the top , what a friggin' mess ! It looked good till the next painter had to spot repair it later due to a collision. It was due to a buddy doing a cheap complete job , then never took it back for the repairs , because insurance was paying the bill this time .

Remember lacquer does not like anything but itself .

SprayTech