RE: Bad Batch of Top Flite Spray Paint
I have never had really good results from laquer that comes in spray cans. It can be affected by heat, cold, and age. All three of these cannot be controlled in the environments that the spray cans are subjected to. I just tried a can of TF Insignia Blue and really wasn't impressed. It is easier for me to stick with getting pints made at the autostore and using the airbrush.
Mark's suggestion is a good one. Also, take the caps off and soak then in some thinner before using them. Paint residue and other debris may get caught in the passage and not provide a good draw.
Scott