ArtMetal

Simon,
How fine of detail are you going for in your part?
I have sand cast using a lost Styrofoam processes ,with a wax covering for detail, and have cast into the final product an impression of my finger print that was accidentally left on the wax. With a good quality fine sand a very detailed surface finish is possible.
From what I have been able to determine brass is not an acceptable material for casting aluminum the melting temperature of the brass is too close to the pouring temperature of the aluminum.
Don