If you are using duplocolour auto lacquer, I'd suggest you use a high build primer first, the auto one should work (I have used the auto acrylic primer on wood ok)
Then sand it back to about 320 400 grit, making sure it is completely flat.
Then the colour coat
Then a clearcoat
Generally I prefer a Matt base coat and then make it shiny with the clear
Either way, this paint colour coat isn't used directly over wood, metal or anything really without the correct primer, I'd say that's your problem here