Jim, I just looked at my tube of Tamiya white putty. I can't imagine there being a problem using their primer since on the white putty tube instructions it says you can 'dilute' the putty with Tamiya lacquer thinner and I'm pretty sure their primer is lacquer based. From what I just read on-line it sounds like your problem may have something to do with 'curing' time, which can be eight hours, or , longer(?) to fully cure, it doesn't say on the tube how long curing time is. Let it sit overnight before priming and see if that doesn't 'cure' the problem.