[Zeke]

I have bought 2 x 6 Trex in the past and it was the same on all 4 sides. The top is grained.

I have used Trex a few times to replace door sills that were buried in brick. People don't understand that you don't build a brick patio that captures the door sill. But Trex saved the situation at least for some years. I give it 10 to 20 depending. I used the smooth bottom side up as door sills aren't typically textured. Same coating.