Quote:
Originally Posted by DOHC V-6  The effectiveness of acid "Lime Away" depends on the content of the minerals in the deposit. Dried well water deposits on glass and porcelain from our area are unaffected by any acid treatments I've tried. "Bar Keepers Friend" or other such products suitable for ceramic cooktops work well............ |
It's the same with CLR.
Regardless of what is done, tape off all trim around the window. Bar Keeper's Friend is slightly abrasive, hence why it is so effective. Rubbing compound would work, but I would recommend using a random orbital or rotary polisher and medium polish/compound. It works well, but if it's aged too far you'll have to hit it with something heavier. I had an experience last year with a 91 SEL with horrendous spotting, and the random orbital with compound alone did not remove it, so just try various things - you'll get it.
...Just don't use ajax, that's a pointless waste of time.