My A530 case was bowed from years of use and heat from the components inside. I have seen many other GVP cases online with the same problems.
I flattened the case by laying it upside down on the bed of my 3D printer. I then placed some weight on the inside of the case and started warming the bed. I slowly brought the bed up to 100C and left it there for about a half hour. At that point I slowly cooled the bed for another half hour. I didn't take a before picture but the after shot is attached.
A couple of notes. Make sure the bed is clean. Like really clean. I somehow got a small dog hair pressed into the case. Be careful with the heat and time. I think I pushed it about as far as I could. There are a couple of small shiny areas where the texture is gone.
