I am in the process of grinding and polishing a pour-in-place concrete countertop. When I am done, I want to seal with a penetrating sealer. I don't want a surface epoxy or wax sealer. I like the look of the exposed aggregate and it looks great when I am wet-polishing it. but when it dries, it's all a very flat light-grey and the aggregate does not stand out well. I would like to darken the color of the concrete to give it that damp-wet look. Perhaps further polishing with finer-grit pads will give it more shine, but I'm curious if someone with experience here can help me decide if I need a stain or if a penetrating sealer will suffice.
The dry look I dont want (dry after 50-grit polish):
The look I am after (slightly damp after 50-grit polish):
If anyone is curious, the dark spots are portland cement I used to fill pits and low spots. Part of my motivation to darken the color is to make them less noticeable.