Daniel wrote:

Bill Daniels wrote ...
... a match sized flame ... virtually eliminates any stress risers
that will cause the plastic to crack later.


Eliminate _risers_? Yes. But I can't imagine a better way to induce
latent stresses in Lexan than to use a flame.

The industry has been doing this for years. They call it "flame polishing".
There are even machines for that. We're not talking glass here.

- Holger