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Re-coated 25" mirror (ready for Winter sky &Planetary oppositions)
Coating had pretty much expired on my 25" mirror (silver coating approx 13 months old). So using my collection of "garden sprayers" etc and "spray silver chemicals", did the re-coat. Actual chemicals used cost less than US$20.
Surprisingly previous DIY coating lasted quite well. As a comparison have attached a couple of pics. First is of the 25" mirror freshly coated. Second pic of my 33" mirror and 12+ months old silver coat (rough [after a clean or two] but still usable [just]).
Stephen.
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