FWIW:
Sounds like an honest rebuild with a cool pedigreed . The odds are high that at least some of the parts have already been reparked , some maybe repeatedly. I would repark it and never look back . Already did it a couple times and will do it again. The old USGI shop manuals have directions for using bake-on stove paint ( flat black ) for the stainless steel gas system parts. There were and are fancier ways to refinish the stainless , but stove paint is just as historically legit as the other methods.
ETA:
I dunno about the Canadian market , but reparking the gun would make zero difference in shooter grade gun price down here. Personally , I would check the gun for any rare and original finish collector restoration parts , replace them , and then just get the gun refinished.