: Hi I'm gonna build a 10" DOB. What is the # of the grits and Name of the grits I will need? Also any other info Will be greatly appreciated. I'm a first timer and am a little confused. I'm pretty handy though and don't think I'll have a problem Doing the telescope constuction parts. It's just the optics I'm nervous about.

: Thanks : Tom P I would suggest the following:silicon carbide; #80,120,150,180,220,400,aluminum oxide;30,25,20,15 ,9,5 micron,and i would suggest useing cerium oxide to polish,red rouge takes 3 or 4 times longer than cerium oxide,mirror is not completely polished out until you see no graininess from the center of mirror to the extreme edge when viewed at an angle to a str ong light source(i use the sun). I would also suggest getting a book about making mirrors (ATM VOLUME 1 is a good book)this will give you all the details of grinding,polishing and figuring. ............................good luck.