Limestone Whitening?

I cleaned a small piece of limestone for a potential customer as a demo. It cleaned about like I would expect, nothing usual. It’s old limestone though, and in general the whole stone has a yellow hue. The customer wants it to be perfectly white like a fresh, straight cut piece of limestone he showed me.

Is there any way to actually whiten limestone? I know some people use OA to lessen the orange from iron in the stone, but I’d say this is a different scenario.

Maybe try One Restore from eacochem

Remove organic stains first, then apply one restore… do you have a photo of the stone?

I use prosoco for limestone.

Unfortunately I only have a before picture. The black came off fine. It was still wet and I recommended taking a look when it was dry.

The yellow hue looked kind of like this. It just wasn’t nice and white like the fresh stone he had.
VideoCapture_20210109-154752

I’ll look into both one restore and prosoco. Thanks for the recommendations.