Re: Cerakote Scope
I've done the H-Series Cerakote per their recommendations on a GRSC 1-4x scope. I only took it up to 170 or 180 degrees F, which is what your scope is supposd to be able to withstand if you leave it in the sun.
The air-cure is another easy rattle-can option.
I do a ton of prep before Cerakoting, focusing on degreasing, handling with gloves, acetone bath, and hanging in my spray cabinet that I built. I have a ton of hooks made specifically for the cabinet and the oven, and transfering between the two is one of the most critical points where patience and more patience is your friend.
For a scope, it's good practice to clean the lenses with manufacturer recommended procedures. I use a dry optics brush, and a clean micro-fiber lens cloth.
I remove the batteries from the illumination module, and the spare batteries which are in the GRSC knob caps.
I then make foam inserts for the ocular and objective ends, wedge them firmly into place, and wipe down the exterior body of the tube with a cleaner, then remove any residue with acetone on a micro-fiber cloth that doesn't shed lint or fiber.
I hung the GRSC in my cabinet with the mount, and air-brushed it with FDE, checking with intense, full, white light and daylight to ensure coverage. I then carefully removed the lens foam inserts, as I didn't want foam melting in the oven. It is very tricky dealing with a sprayed, un-baked part, as a smudge has to be baked, then ground off, and re-sprayed. I used tweezers to remove the foam inserts as the scope hung in the cabinet, thereby avoiding any smudging of the surface.
I then transfered to the oven, and baked at low temp for maybe 45 minutes.
The last time I shot with the scope, I was getting .5 MOA vertical spread, and maybe .75-.8 MOA horizontal with a beater 5.56 carbine that has an AR Performance melonited barrel in it, pushing 69gr SMK's on top of N140 or TAC IIRC.
For the S&B with the rubber mag ring, I would highly suggest going the air-cure rattle can route. You would probably warp the rubber magnification ring, which needs to be taped off anyway.
Yes, I did the painful work on the blaster in the pics as well, which took 10 days of full-time slave labor. I won't do one of those again unless I get a sado-masochist streak and feel like punishing myself for no good reason.