The plaque project itself is unimpressive, just a fast glue up of poplar cut into a circle and routed edge. But the interesting part is the wood piece mounted on the plaque. It is about a 1 1/2 inch thick cross section of a 100 year old Natural Gas Main Line. The pieces were found in a public works excavation. The Gas lines were made of tree trunks bored through the middle and treated with some sort of preservative. Sections were originally about 10 feet long and 10 inches in diameter. I made about 10 of these, as Awards for the organization my wife works for.
For the finish I used MinWax stain and poly then another coat of poly on the poplar. Oon the Gas Line I put 3 coats of MinWax polyurethane.