... but it's sure messy. I did it once that way and I'll never do it again. Similarly you can drip candle wax over the plan and then iron it into the paper to make "waxed paper" out of the plan. Less sticky but still very messy to do.

My favourite option is to tape the plans up to a big window plan side out and just sketch in all the intersections and basic lines you need by tracing the mirror image on the back side of the plan. Place plan back down on building board trace side up and carry on. You get the same info but it's clean.