General Underseal chisel

It's often useful when spotting a small suspect area of delaminating (original) VW underseal, to investigate further. Invariably there'll be damp and water behind it (dark rusty, rather than dry rusty metal).

A few minutes shaping* an old wood chisel on a bench grinder, or surface stone can make a good tool for easily cutting/shearing the whole thickness of underseal away, and picking apart any areas holding damp.

I used a reasonable Draper 3/8" chisel, and occasionally re-shape and re-sharpen it.

• rough and ready first, then a smooth stone to re-sharpen.