If your issue is edges you can buy a 30 dollar heatsealing iron on amazon. Set to around 120c and it will soften but not melt the droopy edges. They come with a nonstick surface so it wont stick if the temp is low.
Then find yourself a polished metal rod and lightly rub the edge while cooling and it will shine up.
It takes some practice so try on scraps first.
There are other methods using heated vapors but they can be extremely dangerous.
Google "vapor polishing" and I am sure you will find the process