We do a lot of honed black absolute refinishing in this area.
On really good quality black ab that is honed high and has a good dark color I try to leave them natural.
A good daily cleaner and logical maintenance will keep them looking good.
When we do use color enhancer which is most of the time here are some of the ones I like.
All of these are safe for food surfaces as well.
Safe to apply-yes as long as you follow instructions and wear the proper protection.
Aqua mix enrich and seal.
Miracle one step enhance and seal.(stinks)
Dry treat color enhancer-not great but durable sometimes we use it after another color enhancer.
Tenax Agers
Filaplus color enhancer.
MB-21 I know -sounds like a plug but actually it works really
good.no smell-easy to use.