Hey guys,

PVA is the only option. But spraying it is really the way to go. To be honest, if you can't spray the PVA, I'd switch to an epoxy tooling system. Brushing PVA can leave areas exposed, and styrene based tooling systems can be really unforgiving when that happens. 

I've got a compressor.  I only spray pva....that's cuz my brushing skills suck lol.  Ok...pva it is

Good stuff, PVA is the way to go then! 

Try doing it without waxing the part first. I find PVA on its own sprays on very nicely, and if you spray it on thick enough it almost demould as easily as a semi-perm. 

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.  

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.

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

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.

I concur ^