So far the Poly-Span I have used curls towards the surface that is the ruff side. As stated, if you hold it under a light you will see the ruff side is a little duller sheen. But if you so put it down wrong, put several more coats of dope on before sanding very lightly, other wise use Larry Renger's idea of SLC(Super Lite Covering) from Corehouse instead of dope.