Blue masking tape = really no adhesion. The first step is probably strip off the lacquer and see what you can get to stick. Take a look at the sanding sealer manufacturer's site and see what of it's finishes this is compatible with. You're going to have to do a few tests to see what works.
Painter's tape isn't an adequate adhesion test - use the clear Scotch tape. Duct tape can be a more severe test, but I only use that for exterior painting.
Like I said, I haven't worked with that particular product, so I don't know where the incompatibility comes in. With the old formulations, you could spray lacquer over urethane, but I don't know if you can put urethane over vinyl, or whatever it is.