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Posts Tagged ‘observatory dome’

Nothing like a nice June day in May to give the little observatory dome it’s annual washing.

The dome is fiberglass, about twenty years old, and, of course, sits exposed to the weather day and night. But still it amazes me what the rain and air does to it. How does it get this grungy? Are we breathing this stuff? I feel like we’re out in the country, but I guess not far enough out!

These pictures were taken after I had cleaned the shutter – the central part, but not the two sides.

Not sure you can really appreciate the grunge unless you scrub with brush and sponge and see the putrid green water that you then wash off.

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I spent nearly two hours cleaning the observatory dome Friday – that’s probably a one-hour job for a normal person. Lestoil, a bucket of water, and a scrub brush did the trick. Here’s a partly before/after shot. What IS that black stuff?

Before I started the whole dome looked like the shutter - ugh!

Before I started the whole dome looked like the shutter - ugh!

And here's how it looks when cleaned? I did this about a year ago as well - maybe two?

And here's how it looks when cleaned? I did this about a year ago as well - maybe two?

I built this in 1992 (or thereabouts) and only cleaned it once before. Maybe that cleaning was worse, but not in my memory. I think it was a year ago, maybe two – certainly not three. I don’t know if this is something that gets deposited from rain? Air? Or of it’s some sort of growth on the fiberglass?

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