plastic jet exhaust--oob build

Hi guys.

throwing you a curve ball. I got the new Moebius Viper Mk II kit and it comes with plasic exhausts. Nice but not PE, and I do not want to add PE to this particular kit.

For OOB builds i have seen some guys take the plastic and add different levels of metallic to get the look of the individual feathers correct. I dont see a discussion on that. and I know there are dozens of PE discussons regarding it. I plan to begin with Alclad Magnesium and work from there adding color and highlight as I go for a scorched titanium look. Anyone got a fave technique for working thier plastic jetnozzles to a higher quality?

Thanks