I have been using Lenspen for years without 1 scratch. I even do all my Telescope Primary lenses, so they aren't just for small areas.
or use a kit like Dave shows
EDIT: I better mention that I don't use LensPens on Reflectors. Just glass lenses. For mirrors I use Distilled (Purified/DeIonised) water.
Last Edit: Nov 16, 2016 11:02:51 GMT by Dragon Man
__________________________________________ Ken James - Snake Valley Australia CAMERAS: Samsung SCB-4000, Mallincam Xtreme & Xterminator, 3 different Revolution Imagers, 2 ToUcams, SX-5c, Canon 350d, 2 different IMX224's (an RI & RT) and an RT178. Broadcaster on NSN as 'Snake Valley Australia' HERE --> www.nightskiesnetwork.com/ - Video Astronomy Website: ballaratman.wix.com/videoastronomy