I don't. Just pick them out with tweezers. It's one of the brilliant things of pva, it has excellent self levelling properties so it will go flat again once you have picked the bug out. But even if you can't, it's not too hard to sand small imperfections like that out of the mould. 

On that plug the PVA didn't actually come off at all. The mould popped off and the PVA is still good for another pull! 

Exactly like that!

The best thing about it is peeling the PVA off after you've taken the mould.  Its really pleasing like picking a scab.

I concur ^

I would PVA it.  You need an effective barrier that can be applied without the solvent attacking the plastic.  I often spray PVA on an unwaxed plug and then apply one coat of wax onto the PVA.  Sounds wrong but the PVA really protects the parts and the wax on top makes the mould fall off.  Make sure you get a good coat of PVA though.  I use the blue stuff and apply a good few dust coats before a few full film coats.  The finished plug has a good blue finish so I'm sure its safe.

Well is Easy-lease solvent based? I've tried Frekote on a few plastic trims, some it works but some I've destroyed. 

I rarely use PVA and just use Easy lease on the part and if used correctly you genuine part will be left in as new condition.

I think I'll wax and pva since I can't take a chance at ruining the part.  The only problem with pva is that I can only spray it in my back yard.  Fricken bugs love to fly into it as its drying, ruining the damn thing.