http://www.buyheatshrink.com/
For best results, remove and discard the bezel ring.
1. Buy a one foot section of 4" heat shrink tubing. (comes in different colors!)
2. Cut a 15/16 in strip of tubing from the one foot section.
3. Prop the Speedo / Tach face down on a .31 in high round "thing". I used a lid from a small jar of "Dromedary Diced Pimientos" (upside down to accommodate the slight curve in the glass)
4. Place the 15/16 in strip of heat shrink around the bezel.
5. Apply heat from a heat gun evenly all the way around.
Notes: The .31 dimension is from the front edge of the bezel to the work surface, with the tach / speedo face down on a suitable prop. You have to allow for the slight curve of the glass. If done exactly, there is no trimming required. A lid from a small jar of "Dromedary Diced Pimientos" works perfectly because it forms a cup to keep the glass curve from wobbling when you apply the heat.
There is enough material in the 1' length of 4" heat shrink material to do 12 Tachs or Speedos, so share with your buddy.
Note: Disregard the mug with the picture of a golden. That's her food measuring cup.
Disregard the glass of wine in the background.
That's what I take to relieve the stress of having a golden that eats everything.
The Tums are to relieve the heartburn from too much drinking due to the golden. It's a viscous circle.