I am working on a kitchen job and am currently varnishing the doors. Always a PIA but not this time. My TS has an 18 roller out feed extension table that makes a great location to paint/varnish the backs of the cabinet doors. Because 90% of the cabinet doors that I build have a rounded/chamfered/styled front perimeter edge the edges of the door do not come in contact with the surface it is on until it is turned over. Basically the paint/varnish does not come in contact with the table or work surface. Moving the piece can be troublesome however. I discovered that the roller out feed table makes a great place to paint the doors and affords me the ability to roll the door to one end or the other to paint the edges and it allows me to reach from beneath to carry the door to another location with out getting paint on my hands.
Today I picked up a set of painters pyramids, those small plastic things the allow you set the door on top of them with the door elevated a couple of inches so that you can paint the edges, or reach underneath to move the piece after painting. Wow what a simple solution that works really really well. I wish that they had been available or that I had known about them about 300 doors ago. Yes I had been using small blocks of wood, etc but these only make contact in a very small area on the bottoms and are less likely to disturb a finish that is not totally cured yet. $6 for 10.