Are you spraying tamiya cans or another lacquer over the enamel??? or enamel again, if you spray the same kind of paint over and over again doesnt happen anything, so.. if your paint cracks... the only thing that I know that make make this is use acrilic over enamel, so... if you've done this....this is the problem, you CANNOT use the acrilic spray cans over enamels, if you use enamels over enamels and the paint cracks.... dude, I dont know
