For putting the burst on, first get the main colour on to where you're happy with it, let it cure, gently steel wool, apply the burst by hand or spray, let cure, then apply your top/clear coats. There may be variations on this process but that's what worked for me.
Seem to remember using paint thinner (acrylic lacquer thinner) for cleaning up the airbrush so may have put a little in the BMW to help spraying. I see elsewhere you have got in touch with DB about DingoTone, he knows more about these products than I do so you're on the right track there.
The back and sides were straight BMW. In hindsight, pretty sure I over sanded them trying to get as flat/smooth a finish as possible. Think I sanded to 600 grit (before applying the first coat of stain) instead of stopping at 320 or 400, which would be why the stains didn't take as well as they could have.
Think that covers about all I can help with.
Love your Maton.