I would sand and rebase with light coats, provided the exist. base
isn't out of it's recoat window.
Some bases need to be cleared within 24 hrs or it's recommended
to strip and start over.
And most don't need to be sanded to re-base over.
You need to check your product for mfg recom. for time allowed
When re-baseing you may need to put it on lighter.
Also check your gun pressure setting, remember the mfg recom.
is the psi at the gun with the trigger pulled.
You may be spraying with low psi.
It could be a lot of things, that's just a couple to check.