If you still have crazing in the compass
dome after you finish polishing, you can hide the crazing with a permanent black marker.
- Make sure the compass is completely DRY.
- Color in a patch the size of a quarter, then wipe off the excess quickly with a tissue ( keep rubbing to remove all of the black from the surface ).
The black ink penetrates into the crazing lines, and stops the light from reflecting from the crack, making it almost invisible.
See the attached images
. The first one shows marker before being wiped off (left) and finished patch (right). The second image shows a larger area completed.
Another tip: If you have to refill the compass, I had good results from using Mineral Spirits. Take and old ballpoint pen and cut off 1 inch of the tube that holds the ink. Drill a hole in the lid of the Mineral Oil
bottle, and krazy glue the pen tube into the lid. It fits the fill hole in the compass, and is faster than using a syringe.
Put the screw back in, rotate the compass to get all the air bubbles to the top, then invert the compass again, loosen the fill screw, and squeeze the diaphragm
rubber on the bottom to get the last air out.
Keep the diaphragm
depressed as you put the screw back in. ( or the diaphragm may split from the excess pressure on a hot day. It is there to absorb the expansion and contraction. Don't overfill )