Keep the lacquer primer to a very minimal thickness. Sand the frame all over just barely breaking through everywhere. Then use some self etching primer as a sealer, then paint. The self etching primer is similar to the lacquer primer in application but will help the paint adhere where you break through. Lacquer primer is brittle and plus you don't want a big build up of material in the holes and on the frame where you might put cable clamps. SEM makes a self etching primer. Get it at maybe an auto parts store or auto paint supplier it sprays and applies very similar to lacquer primer, but goes on very thin allowing for good adhesion, ( its comes as an aerosol). I don't recommend lacquer primer but for most it works ok. 2k primer ( 2 part catalyzed) is the way to go.
