Let's try a few other things.
Here is another ash tray door that has suffered from time and UV rays.
![](http://gafieroclub.org/pics/pip/tshark/tdoor8.jpg)
I masked off the right side, and tried each of these products on the left side.
![](http://gafieroclub.org/pics/pip/tshark/tdoor9.jpg)
I really couldn't tell that there was any improvement.
Finally, I tried brake fluid on the right side of the door.
![](http://gafieroclub.org/pics/pip/tshark/tdoor10.jpg)
Again, an improvement.
Let's compare the various results.
![](http://gafieroclub.org/pics/pip/tshark/tdoor11.jpg)
Actually, the brake fluid was easy, and compared well to the toothpaste method.
The starting fluids were useless; the WD-40 really wasn't as expected. The brake fluid was a surprise.
I guess I could try kerosene or gasoline; however, the WD-40 leaves behind an unpleasant smell.