I am intrigued in your gauge fix. Want to hear how it lasts. I have heard armor all off gasses, and wonder if that will cloud the glass.
I was concerned about the Armorall fix, too. I kick myself for not having
a 'before' photo of the instrument panel. It was just horrible. I think the
replacement was something like $300 and the hour meter would be new
(and wrong). I passed up an oppy to buy a used cluster on eBay last
spring....I think it sold for only $50-75, if I recall.
Here is what I did: I cleaned all of the black backing with rubbing alcohol,
being very careful around the tach, fuel, and temp needles. I let it sit
for a few days. Then I used the Armorall on it, letting it sit for a day
between 2 coats. I kept it open for a week or two in a dust-free area.
Then and only then did I put the new lens and rubber gasket on. I set
it aside in the packing box to see how it aged. That was back in about
June or July. It has held up extremely well. The new lens and gasket
were reasonably priced.