Maybe even something as simple as plaster of paris ... with a little filler for strength you could likely get by with relatively thin inside coatings, sufficiently strong to support slitting. Rather than the cutoff wheel approach I would suggest biting the bullet for a good balanced slitting wheel mounted on a proper arbor/drill press/etc, and a jig of sorts to support the can(s) that are being targeted to project at high velocities across the room. RiB On Sun, Jun 19, 2011 at 19:10, Roger, in Bangkok wrote= : > babbitt, et al ... > > RiB > > On Sun, Jun 19, 2011 at 18:00, Walter Banks wrote: > >> It has been a while since I have done something like this. >> >> There used to me a metal compound that we use that had a >> low melting point. We used to cast it around parts that were >> delicate and then machine keeping everything cool. >> When we were done we melted the compound and >> freed the object. You could do the same thing with a coke can. >> >> I would guess you could fill a coke can with wax then cut >> with a slitting saw on a mill or even on a drill press with a jig. >> Use water as a coolant. You might want to freeze the can and wax. >> >> w.. >> >> > >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .