Sam, there are several machine -able waxes that are made in blue. I dont use them because they tend to have problems in the burn-out part of the lost wax processes because of the what they are made from and some are not intended to be used in casting. I dont keep the shaved wax cuttings. I will save solid chunks of wax left over from the process for remelting and reuse. The shavings tend to have dust or metal or other particles in them that will destroy a casting. That costs more that the wax i would save, a lot more.