GUS wrote:...but any good sources for powdered smoke & filtration thereof? ..i'm in unknown ground where that's concerned.
Go to the top of any page on this forum and click on the "Franco's Famous Sausage Making" logo, then navigate to "Essential Ingredients". You'll find hickory smoke powder, there. Because so little is required, 0.5 gm/kg, it may not be necessary to filter. If you do decide to filter, you could try various home approaches to filtering, such as multi-layer cheese cloths, paper cone coffee filters (or flat-bottom paper coffee filters in a sieve), thin linen kitchen towel, but brewers sometimes use plate filters to remove particulate from and clarify beers. They are not cheap, but you should be able to find plate filters in a well-stocked brewing supply shop or e-store.
You've got me curious. I may have to try a couple of different approaches, myself.