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I've been using a soft brush for years to lightly dust particles off my mirrors. But sometimes that can result in tiny sleeks. I never tried compressed air, because I read you shouldn't use the ones with propellents (like those used for computers). So what type of compressed air can you use and where can you buy it?

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I never use canned or compressed air. Every astronomer should have a Giotto's Rocket Air.

David E

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David E

So when at times the mob is swayed
To carry praise or blame too far,
We may choose something like a star
To stay our minds on and be staid.

-Robert Frost

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