This ^^^^
Surprisingly enough, its not that difficult.
Alox is a huge smoke generator, and it has to sit to cure. Some say a day or two, some say a few weeks. And its real easy to use too much.
Tried it once, never again. Just too much of a mess.
Have you done any testing ? Say you tumble lube some coated bullets and shoot them is there a sizable difference in the smoke.
Powder coating seems to be the new hot setup. I do powder coat my own, and the biggest difference I've seen is less smoke over traditionally wax lubed bullets. It does help to cover the whole projectile and not just the top and leave the bottom bare.
I'm not pushing record speeds with these, I'm generally between 800-1000 fps, according to book data.
That polymer coating when applied correctly can take a pounding. I've pulled some out of the lead catch after a pin shoot, coating doesn't come off where the rifling is, even stays on where it hits.
I have seen the coating come off if its not done right, or if case mouth flare/bell isn't enough.
Hi-tek seems to be another really popular method, but I haven't tried it yet. Seems like an awful lot of work, but theres also a lot of success with it.
Like anything else with lead, fit is king. I have seen undersized powder coated lead smoke just as bad. Push it too fast without a gas check, same thing, here comes ol' smokey.
Crimp dies, or improper crimps also seem to be a contributing factor in super smokey rounds.
A lot of reloaders seem to think the lee f.c.d. is the one and all cure all for any and every bullet problem, but those f.c.d.'s are also notorious for undersizing softer lead mixes when they crimp.