flushing vs skimming new steam install. is there better thread paste to reduce contamination?

most skimming i've seen is related to oil from manufacture (and for that matter flushing see, e.g. gerry gill flushing brand new boiler with wand in the return) and maybe later flushing sludge esp from wet return or skimming if some newly threaded piping might have introduced oil to the system. I admit I never flushed a boiler the way he is and I'm usually not as fortunate to have a floor drain for such a wide open process as Gerry employs.

Seems unfortunate if this is a useful practice that manufacturers don't offer a tapping that would allow you to send a wand across the top row of push nipples to spray down and then you could leave a T at the return with a hose outlet for draining what is flushed down. (generally such a tapping would be higher than a skim port based on standard water level but if it were a good sized tapping you could raise the water level a bit above its weir to skim). using the low tapping, maybe a rube goldberg with a tee for the return pointing down into bucket if high enough or to hose outlet and then a bushing with some kind of gland fitting that could be fitted over the wand would be an alternative with no floor drain.

That said, i've skimmed but have not flushed new boilers and haven't had a lot of trouble. And there are plenty of testimonials of those who use a treatment for a week after install and then drain and refill.

To minimize threading oil I get into the system I've been wiping the nipples i thread and then spraying with green brakekleen but folks seem to say boiler it is likely loaded down with oil anyway from manufacturing. Still seems like a reasonable caution to me and because the brakekleen evaporates I don't think i'm going frying pan into the fire with what emphemeral traces it might leave behind.

As an aside I do get to wonder if there is any industry standard for internal flushing machined castings to reduce the remnant manufacturing fluids. But from the sense that that is the main source of contamination maybe worrying about the chemistry of thread paste among modern PTFE alternatives is angells on the head of a pin comparatively. Just thought I would ask if anyone has experience that some brands or chemistries are better than others for steam.

I suppose I'm also asking about emperical results with the paste for assembly of the larger joints in near boiler piping–whether any paste performs better in your experience (I admit I'm a tape and dope man although of course I could pretty much avoid chemistry if I just used blue monster tape alone).

thanks, brian