Quote:Will this be OK as well for a secondary mirror or must different techniques be used?
Paul Long Island, New York Orion Starmax 127 Mak; TScope 14" f/4.7 dob w/ F80 finder; 10" f/4.8 dob; Orion 100mm f/6 achromat; Orion 10x50 Ultraview Binoculars
Quote: Don't use a brush, I learned that one the hard way.Jon
Home made 16" f5 Terry Ostahowski optics - ArgoNavis/ServoCAT
ES 30 mm, Ethos 21, 13 and 10 mm, Paracorr II, Antares Barlow 2" 1.6X
2" DGM NPB filter
2" Catseye Cheshire/Sight tube - 2" Howie Glatter laser + Tublug