Any suggestions to remove this?
Follex???
I'm not the best person to ask about much in the area of interior detailing. I know basics of course and use to teach how to use steam machines and hot water extractors, but it's something I simply don't enjoy, so my interest level is low and thus my knowledge base is limited. I'm more of a paint polisher.
Do some Google research for coffee stain removal and use the word tannin in the search terms. The like all of us, read the reviews and at some point, pull the lever.
At Dr. Beasley's, we do have a tannin stain remover, but to be honest, I have not needed to remove any coffee or other tannin stains as I simply don't have these types of stains in our daily drivers.
Tannin Cleanser
I'm confident it would, like any other product, either work or not, depending upon the material and how long the stain has been in the material. It's always best to try to remove tannin stains as soon as possible.
If you get a bottle, let us know how it works and be sure to take BEFORE pictures.
Mike