[RASMB] rehabilitating bad windows

[Dyche Mullins]

Two quick questions:

1. What is the current conventional wisdom on polishing dinged windows? 
We have a few quartz windows
     with fine scratches and small gouges. Is it worth having them 
polished? And if so, where?

2. We always clean our windows using the Walter Stafford trick of 
incubating them for 20-30 minutes in the
     bath sonicator with SDS. This works spectacularly well. A few of 
our windows, however, appear to have
     developed a sonication- and SDS-resistant residue. What do others 
recommend for more thorough
     cleaning? Chromic sulfuric acid? Nitric acid? Other suggestions?

xoxo
Dyche Mullins