I am going to try using wood chips/sawdust for fluxing during my casting sessions and melting down wheel weights. I have been doing a lot of wood working in the restoration and rebuilding and cabinet work in our 1905 vintage farm house and wonder what size of wood chips or sawdust work out best for fluxing the rendering of wheel weights and boolit casting operations. Off the router table I get some pretty fine sawdust and off the table saw I get some more course saw dust and off the jointer I get some really course/chips of wood. So I have a choice of sizes available. So, what works out best?