Q. We put down Trex decking in 2008. The composite lumber has developed dark spots all over it. It started with a few spots and has multiplied over the two-year period. What is causing the spotting, ...

Q: Our vacation house has vintage Trex decking. After a few years, it became horribly ugly, and no amount of cleaning or brightening ever did more than just lighten the stains. More than five years ...