Well Jeff... If you can't sleep at night using a lacquer sanding sealer, by all means don't use the stuff. But telling people it's too unstable to use like that is ridiculous. Actually it's a bogus statement.
I just told you i've been using it for 15 years on bows now without a single issue. Even Thunderbird sells the lacquer sanding sealer as a base for their epoxy clear coat....
BUT.... realistically... filling deep pores with lacquer isn't the best solution because it shrinks a bit. You need to do several applications and let it cure out a bit longer. Even then, you may need a leveling coat of high gloss high solids material and some sanding to get it filled completely. Deep slotted grain like wenge needs a high solids material to fill it properly that doesn't shrink.
A couple wet coats of high gloss auto clear coat will typically do the trick.... Kirk