Use a scorper or flat. I like to make mine from metal that is harder than the gold but softer than the metal the gold is inlaid into, to reduce scratching of the piece. People with better control than I use whatever is handy.
Here is an excellent summary of the steps and tools involved in inlay:
I'm not sure what others do but sometimes I scrape an inlay down a bit...............very carefully. It depends on if there is a lot of bulk to get rid of.
Hi Cloudy ... a piece of square or round brass stock that fits into a GRS quick change and sharpened as a flat works well but requires frequent sharpening. Using a microscope for accuracy, a #40 HSS flat with the corners knocked off. For any nicks in the steel, a sewing needle, (with the tip rounded off) held in a mechanical pencil, makes a nice burnisher to be used prior to stoning. Glad that you are using stones .... use 600 or better but just as it becomes flush, finish it off with paper as it cleans up the inlay without scalloping it. Have fun
Chris - thanks for the tip about turning a needle into a fine burnisher. Todd Daniels gave me the tip about taking a fine ball point pen, using an ultrasonic to clean the ink out of it and using that as a small burnisher. Good to have another option.
You can also use a tine from a cheap stainless steel fork. Grind it like a flat.
I personally use just a regular old flat. Just take it down as far as you feel comfortable without maring the base metal, then go to your stones.