This top had a strange pattern in the varnish. I couldn't tell until I started cleaning it that it was from exposure to smoke. My whole shop smelled like a fireplace as I was removing the soot. Pictured below is the top with some of the mess removed. I will need to check every seem for the glue as heat will destroy its bonding strength. so far it seems ok except for the end block that needs to be replaced due to a crack caused by a poorly fitting end-pin.Below is one of the corners as I found it. The gray is all soot and has now been removed. The varnish is actually closer to a honey color. I will be posting after pictures as soon as the entire instrument is cleaned.