I haven't used the Testors lacquers, so I can't comment on them. That being said, you would do well to give Tamiya lacquer sprays a try - good stuff!! Their primer, available in white and grey is also very nice to use, very fine grain, and doesn't bury molded in details. As Ismael mentioned, the best money you cna spend is on a cartridge-type respirator made for lacquers and other VOC materials. Lacquers dry fast, lay down thin, and cure rock hard. Here are a couple cars done with Tamiya sprays, and rubbed out with Novus plastic polish #2.
Tamiya Ferrari 360 Modena, painted TS-16 Yellow:
Monogram '65 Corvette Stingray, painted TS-08 Italian Red:
Neither of those have any clear, just rubbed with Novus #2.
Brian