David Lesher fired this volley in news:k0rtac$48b$1
@reader1.panix.com:

He was using a stick welder with some old theater projector
carbon rods.

Gouging puts out more UV than any other operation.

In addition, even fabric has "holes" between the threads of the weave. You
pump enough UV long enough, and still enough of it gets through.

LLoyd