I also use the masonite boards that are tempered on one side and rough
on the other. I have some round some rectangular. They work great
for transporting work,etc. and don't warp. Many times we leave works
on the boards and cover with dry cleaning bags. Otherwise we use
Ziploc bags. I still cover the tables with vinyl table cloths with
felt type back on the reverse from the $1 store.
creatively, Linda in Oregon