Many suppliers of microcrystalline waxes are available, Renaissance is popular (especially in the UK) but probably the most expensive.
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Works well. Good waterproofing. Very expensive. Other finishes or another finish in addition to MCW will give much better high gloss results, IMHO. I use it when I don't want to apply a finish. Great for handled objects, very little hand transfer, good fingerprint protection. Some MCW is food- safe, used in cosmetics. Some have UV protection additives. Slightly over-hyped. MCW is a good material, but still over-priced considering it's manufacturing cost. Hype: Renews faded colors - Not unless they are there to begin with, does nothing for UV or chemical fading.
Buffs to a high gloss - Not the same as a Urethane or poly finish. Best gloss is in use over a urethane or poly base.
Unlimited applications - Who are they trying to kid. You will see build- up unless you polish off the excess.
No polish smell - Total BS. There is a distinctive petroleum odor to it and it will mask the natural wood aromas. Polish every object in the gallery and you will faint from the smell (Renaissance, specifically). Does it smell as much as lemon pledge or danish oil? No.
Return your objects to pristine condition - Sorry, all it does is allow a good polish.
Retards weathering on objects - It is not a weatherproofing material. Test some yourself and see the results in one season outdoors.
Renaissance Wax is what all museums use - Not quite true, Micro- Crystalline Waxes are commonly used. Some museums may use Renaissance brand but local museums and galleries here use other brands also.
Micro-crystalline waxes are a good expensive product for a variety of uses. My preferred use is small handled objects or as a final wax finish over other base finishes.