You can try that and most of the ash might burn away.
The ring I did today turned out very good, and I should be finished with it tomorrow, the buyer is asking his girlfriend to marry him next week. I made it out of a old white gold bar pin from the 1920’s so its 14K and has a little platinum in it also. I forgot how hard the white gold was back then, so I broke a couple of prongs and will attach a new head to it tomorrow Lord’s will.
The ring polishing and filing waste was 10% which is acceptable to me. Ash was about a third of a percent so not bad. My next burnout will be 7 hours at 1500 degrees depending on model, hopefully that will remove the rest of the ASH!