Every time that I melted down linotype, I always had to get the temp up pretty high to get the tin to flux back in well. That was using gulfwax for flux. That meant longer cool times before dumping the ingots.
Tonight I tried some sawdust and the tin immediately fluxed in. Wow! Lowered the temp to 550 or so and had great pours and the ingots cooled as fast as WW.
I have always used gulfwax for fluxing or a paint stirrer. Is sawdust THE answer for the best alloy?