Thin the wax down with mineral spirits. I use minwax or Johnson's paste wax. I take an old t-shirt, pour mineral spirits on it, and then rub in the wax. You barely need any, so think of having more mineral spirits than wax an you will not get the yellowing. Also, it is much easier to polish. You really only need the wax to protect from peoples sweat and potato chip grease.....
Kevin - dare I ask what egg white looks like - or smells like after a week?
I just painted one piece with clear polyurethane for wood floors. It brought out the color better than wax, but it is not as smooth. The best color I have seen is from a two part clear epoxy glue. Unfortunately, I was trying to repair a break and the color enhancement just made the crack show up.
not very good! the spray i use brings out more color than anything else i have used. the surface is only slightly smoother than what you start with. more coats help.