I'm working on machining an MLA kit. I've very little experience on milling raw castings, so I went to Moltrecht. He says to scribe layout lines on the rough surfaces of the casting, and to use white layout fluid which is painted on. He mentioned powdered chalk in alcohol. I looked for white layout fluids on the MSC site and didn't see any. It's hard for me to imagine how a layout line drawn on a rough casting surface can be very visible anyway. Am I on the right track? What layout fluid should I buy? Or, if I have to make it, how do I make it and where can I find the ingredients?
Grant Erwin Kirkland, Washington