Thanks again for the information Brian.. I wanted to show some pictures of the table top after the refinishing. My father ended up washing off the top wax, but I'm not sure what he used exactly. The picture below shows the difference between the old oxidized maple patina and what it looked last after a light sanding of 220 grit paper.
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The next two picture shows the table top after the first coat of poly is applied to the fresh surface. This is a big sucker, and very heavy too.. it opens up w/ all the leaves in it well over 112" long.
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My father is happy to have the more noticeable sap/heart wood contrast back.
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I'll see if I can post a picture of the table once it is back in the kitchen..