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Picture of Fix a ceiling light finial with an aluminum can
I have switched out a few of the lights in my house for ceiling fans and found that the fixtures I removed were a little nicer than ones installed in other locations of my house (like the one in the mudroom off the garage).  I had been meaning to switch them out for a while, and when I got around to it, I had lost part of the finial.  I had the nut, but was missing the decorative washer.

I went down to the hardware store, but I could not find anything similar to the part.  Finial nuts are abundant, but that washer piece is very hard to find.  

I figured out that I have a ready supply of domed metal pieces available from soda cans.

Step 1: Supplies and materials

Picture of Supplies and materials
Tools:

1.  Can opener
2.  Sandpaper
3.  Drill w/ metal cutting bit
4.  Metallic spray paint (that matches the color of your fixture)
5.  Scissors or tin snips
6.  You may need some protective gloves and glasses

Materials:

1.  Empty soda or beer can
2.  Something to spray on (I use scrap plywood)
3.  Random wood screw (really doesn't matter what size, but something over and inch)