Paint stripping the chassis

I used CAMS paint stripper to remove the many layers of paint. After 30 years the undercoat on the chassis was like concrete and the paint stripper did a good job of removing most of it. The CAMS paint stripper is very potent, the smallest drop on your arm feels like someone has stabbed you  with a burning cigarette. But it was neutralised with water and the frame was just a mater of hosing down to remove the paint and stripper.