I have made my first plug (MDF, 2K High Build Primer, 2K Lacquer) and need to know what is the best Release Agent to use with a new 2K covered plug and the Unimould System and can i use Newplast instead of filleting Wax ?.

i would wax for sure

pva provides a barrier, wax provides slip ....

if you going to be making a number of the parts the mold will season and then you will need wax only, so i would get it waxed