I am designing and building a fiber glass body for a formula-style race car (approximately 4' x 6' foot print). I am using Chavant I-307 sulphur based hard styling clay to build up a two inch thick layer on my buck (made from blue insulating foam) such that one inch may be milled off to create the semi-final model. I have found a manufacturer with a 5-axis mill; however, he is inexperienced with clay.
Question: does anyone have any information on what type of cutters to use, the desired feed rates, quill speeds, how to deal with the excess chips and how to protect/clean the mill during/after the process?