Abitibi- I am not sure of the spelling- is a 1/8 inch thick board
with a smooth formica like side my wife uses as a backing for her
painting. I bought it at a local lumber dealer. It comes in 4 by
8 foot sheets. It seems to be stable but not sure about
weathering. But if it only a one day use, it might be a good
candidate for a varroa board.
One side is smooth white plastic and the other side looks like
masonite. I recall the price was not much more than a regular 1/4
4 x 8 sheet of plywood.
Bill Truesdell
Bath, ME