I lub with what ever I find first, RCBS or Lee's or what ever that other one is. Yes, one finger and thumb gets slick. Big deal.
I like to tumble (in water with steel pins and some cleaner) after the sizing operation. I have found that in some/most cases the sizing will break a scale of carbon free from the inside of the brass cases. My wash cleans them up inside and out.
Oh, with carbide dies, I will use a very little lub. They are going to get cleaned again anyway.