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Gadgets, Gizmos, and Dohickeys => Cutting, Grinding, Polishing => Topic started by: drnihili on March 15, 2015, 05:13:39 PM

Title: Silly question
Post by: drnihili on March 15, 2015, 05:13:39 PM

What grit do you reckon scotch brite pads are? :blob1:

Title: Re: Silly question
Post by: Bentiron on March 15, 2015, 05:16:07 PM

I don't know but have used them often to put a nice "scratch" matte finish on bronze, copper and silver castings. :WEEEE:

Title: Re: Silly question
Post by: drnihili on March 15, 2015, 05:36:32 PM

I'm using one to try to smooth out the bumpiness on a curve.  It's a quarter of a one inch radius circle in one direction and sixth of a 2 in circle in the other.  No matter how I grind it, the outside of the curve is all full of bumps.   :nono:

Title: Re: Silly question
Post by: drnihili on March 15, 2015, 06:07:57 PM

Well, it was an idea.  Smooth out the grinding bumps, but added some substantial ones form undercutting.  I guess it's back to the wheel for me. :Bash:

Title: Re: Silly question
Post by: MrsWTownsend on March 15, 2015, 08:46:09 PM

Try wet/dry sandpaper???  You can get "Scotchbrite" pads in different degrees of coarseness too- they sell one now for using on ceramic flat top stoves that isn't supposed to scratch the ceramic, it's blue.  We use ones at work that will buff light scratches out of metal and still leave a 16 Ra micro finish, these are a brownish rust color.

Title: Re: Silly question
Post by: drnihili on March 15, 2015, 09:00:13 PM

I've got lots of the blue one, but I think it's not just the grit that is different, but also the hardness of the grit.  The blue ones aren't a lot finer than the green, they just aren't hard enough to scratch.  I'll have to look up the brown ones, I haven't seen them