
Here's the underside of our deck - 1x4 T&G decking with a clear finish.

Here's the underside of our porch roof and also with 1x4 T&G, clear finish. The rafters and knee brace are also finished with a clear stain.
By the way, I'm sure people are wondering why this roof isn't bigger, and why we aren't doing a big porch, and the answer is: stupid zoning code. It's only allowing us a 3' cover and a 6'x6' porch, and believe me, I've analyzed the code and had to jump through hoops to even get the 3' cover.