A while ago I ordered a Pickguard from Amazon. It showed up bent or warped. I complained & they sent a replacement. So a couple days ago I set the warped one in the sun on a flat table. In an hour it was flat. I left it for a couple more days to sun age it. Might give it a few more days. May not as it began to curl up a little after the 3rd day. Probably need to flip it occasionally so both sides experience the same conditions. Sadly, I did not take a before pic of the warp last week as I thought I still had the ones I sent to Amazon.