How to Prevent Warping Sheet Metal During Media Blasting

Or use a new laser rust remover……ten times faster and even gets the spots……..

Temperature is not the reason for sheetmetal warping. I can demonstrate this in my vaporblaster where I can bend sheetmetal and the temp is barely 50 degrees but when you „hammer“ sheetmetal from above you stretch the surface on one side and it bends. Now if you „hammer“ the backside you can straighten it again to some extend.
Now „shooting“ at a shallow angle only „scratches“ the surface but does not stretch it and that avoids bending.
Greetings, Bernhard