“Great price for a twinpack of painting boards. Works out at 50 cents each ! You can afford to spoil board after board; but don't throw them out, just re-prime them and use them again! They don't warp and they're durable enough for field trips. If you'd prefer a 'slower' surface, just lightly sand the surface with a fine grade sandpaper to give it a bit of 'tooth'. Not really necessary as they're great as they are.”