My wife picked up a GBD made Irwin's 9613 as an early birthday present, and while cleaning it up I decided to not smoke it until IPSD this month. No abrasives were used except a wet paper towel with a lighter, toothpaste, and my thumb, and the cake was removed with a Case XX clip blade. In reading about the Irwin's line, I found that the pipes were cured with rum. To simulate this I've coated the bowl with a very fine layer of rum simple syrup and coated the layer with sorghum ash. The stem will be thumb buffed with a little more toothpaste but satisfied overall.