Re: Marble Table - Maintenance, DOs and DON'Ts
I have never seen a marble surface plate. If it is a table and not a surface plate, you would not want to use it to measure parts on.
A surface plate is a calibrated tool, it has a known flatness and is graded on the flatness. If you are useing a granite surface plate and are unsure of it, the first thing is to get it calibrated. You will have to call a calibration service, the gages used to check the flatness cost a unbelivible amount of money. Once they grade the plate then all you do is keep it clean, some people use gojo, some use denatured 100% alcohol, I use starret surface plate cleaner. Any of the ways you clean it you must apply and wipe until the cleaner is gone, then use a fresh clean rag and wipe it again. That is done to remove any residue from the cleaning product. A surface plate is a Tool, and should be treated as a tool.