I'm opening this post to ask for advice regarding my first mirror : it's a 8" Schott blank bought with abrasives, polishing compounds & pitch to a French artisan before the lockdown started.
I went through rough grinding without too much trouble and reached target sagitta last week, but will certainly need advice & criticism for the next steps.
Today I made a contact test at grit 230 : note that the thing looking like a chip is glass dust suspension after a quick clean that dried, and the white speckle on the second image is something that went off.
It seems to be going okay-ish, but I'd rather have feedback on the way I'm doing it now that errors would be harsh : here's a video of 2 minutes of grinding.
Thanks to anyone giving time for this, and anyone willing to help me get through polishing & figuring later on.
Edited by chantepierre, 05 April 2020 - 10:10 AM.