This may be of help: "The bone tends to get yellow and pigment eventually over time. It is because they don't get proper exposure to sunlight. On the other side, bone inlay can lighten up when they are placed in a sunny place. ... Sunlight shouldn't be too harsh or direct."

Hi Krissie55, thanks for the response.! The areas that have the yellow splotches are not the bone areas at all, but instead strictly on the resin areas - and just on the front of the drawers. One night table is nearer to the window and the other is far away, yet they both have the same amount of yellow - so I don't think it is sunlight related. I think it's some kind of chemical reaction in the resin - and so wondered if maybe there is a chemical to undo it?

The sunlight is the problem. That's UV damage.

No cure that I know of.

Joseph, Thanks for getting back to me. So I guess even diffuse light causes this issue... ugh.