lacquer turned post spray

I recently lacquered an old jewelry stand, but with the spray kind in black. I have multiple layers done and although some of it looks good, there are large spots that have an uneven almost bubbled look. I'm wondering if I would have to sand down everything, re-prime and start again or if this...

A craftsman made a maple 4 poster fo me - but turns out he used pieces and glued post together - so can't stain as it will be different colour -stripes. I am going to try to paint it - and have read on this site about lacquer giving prof finish. Never done it? Does it need a sprayer - is that...