Best way to clean an etched stain in laminate countertops?
So I used some of the copper etching solution of HO and HCl and some of it accidentally spilled on my bathroom countertop (I think it's laminate, one of those veneer things). I didn't think it sat very long, but now the area where it sat is distinctly lighter. What's interesting is that if I wipe it down with water, it becomes "normal looking," but as soon as it's dry, the lighter stain comes through again.
Anyone have any suggestions? Is this something that can be absorbed or cleaned off? Or is there a solution you can use to darken a countertop?