Ya, you can flatten them pretty easily. Just put a few incandescent light bulbs inside an oven to get it to about 130° F +/- 5°. Then clamp them and bake them for 30 minutes and leave them clamped after you pull them out until they cool off to room temp. Be sure to monitor the temp though. You don't want it hotter than that.
If they are super warped though like a Pringles chip, you'll want to soften them a little before clamping so they don't crack. I just soak those in warm water (~100°) for about 5-10 minutes first. But don't get the water too hot or they will get squished.
Edit: this is only for TRKs, which are harder than Paulsons. If you're doing Paulsons, you can do it with 115 to 120 temps for about 20-25 minutes.