Giant 100mm LED

Step 20 Polishing

My cast was anything but perfect; it had bumps, depressions, lines, and everything in between. Using a vibrating sander I started at 180 grit (to get rid of all the big stuff) and gradually worked my way up to 600 grit (I didn't have any higher) and then finished off polishing with a polishing compound and a soft cloth.

Various stages in polishing/sanding. I couldn't get out all of the imperfections...

Comments

[Richard.marier]

That is pretty impressive. I think I would try sand blasting it to make it evenly mat. Or you could do like they use in industrial plastic manufacturing and dip the thing into acetone. (providing this plastic is sensitive to it) it will make it shiny. ( this is what they use for screwdriver handles at Stanley) Anyway, This is really cool Idea! Congrats...