Where the practitioners are
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Candle making sits between crafts with institutions and crafts without one, and the split is informative.
A craft with a trade body and no extension service
There is a national trade association, and there are ASTM committees with published standards. That is more institutional structure than lip balm or hot sauce has.
What there is not is an extension service publishing free practical guidance. The standards are copyrighted documents you buy, written for manufacturers rather than for someone pouring fifty candles in a kitchen.
So the safety framework is public and the craft knowledge is not, which is the opposite of beekeeping.
Where the knowledge is
Supplier technical teams, who have seen every wick failure with their own wax and will usually answer a specific question well.
Candle making forums and their archives, which are deep and largely invisible to search.
Testing laboratories, which will tell you what they see fail.
And other makers at markets, who are generally open about what went wrong.
What to be careful of
Wick charts presented as answers. They are a starting point and treating them as a result is a common unsafe practice in the craft.
Formulations shared without the vessel, which makes them meaningless.
Confident regulatory claims on forums, particularly about what is and is not required. The mandatory part here is short and public; check it rather than repeat it.
Contributing back
The genuinely useful thing to publish is a burn record: wax, fragrance, load, wick, vessel, and what happened. Formulations without those five are noise, and a recorded test with a photograph of the melt pool is worth more than any recipe.