Avionics Face Cleaning/Restoration

[Seth]

As many of you know, I'm selling my 1967 M20F.  I'm cleaning up the aircraft as much as I can before delivery to the new buyer - the little things.

I'm having the glareshild recoverd/reconditioned, washing off the gritt, vacuming out the inside, repolishing the spinner, etc . . .

However, I do not know how to clean off the face of the KNS-80 RNAV or the ADF.  They are King units with the redish/orangish display.  From years in the sun, or maybe inappropriate earlier cleaning, the face is scuffed or maybe peeling?  Internally?  I don't know.  It's hard to read in the sunlight, but I've made due.

I use the KNS-80 for DME and speed readings, as well as filing direct /R.

I use the ADF for occasional fun, weather when it is all they have, and twice NDB approaches - once in training, and once this last weekend when arriving at KBBB in Minnesota for the prebuy inspection and test flight of another Mooney - details to come on that later.

So, if you have experience with cleaning this sort of display, what is your experience, and does it work?  I would obviously start on an area of the ADF that would really show if it messes it up more.  I'm thinking maybe some sort of polish, or the fluid used to clean the yellow off headlight lenses on worn cars.  When I purchased the plane, the shop said there wasn't too much to be done but send in the unit to an avionics shop.  I'll call my MSC in the morning as well as an avionics shop for advice, but I figured I'd first act the collective wisdom of MooneySpace.com.

Take care, and thank you in advance.

-Seth

[Seth]

Any suggestions?  I plan to put in a call to an avionics shop and do some research.  Mainly I just want the KNS 80 to be easier to read in daylight.  I'm wondering if the gas leaked out over time - however, it's bright enough, just the screen seems scratched up. 

I don't plan on spending anything on the face of the king ADF.

Again, suggestions welcome - I won't post again if no one responds

[OR75]

http://www.chiefaircraft.com/airsec/Avionics/MfgAI/BendixKing4.html

the bezels and lens are sold new ... the lens is what you want. Expensive for a small tiny piece of plastic

 

 

[flyboy0681]

Quote: OR75

http://www.chiefaircraft.com/airsec/Avionics/MfgAI/BendixKing4.html

the bezels and lens are sold new ... the lens is what you want. Expensive for a small tiny piece of plastic

 

[jlunseth]

The "lens" is costly enough that it is cheaper and more reliable to buy a reconditioned KNS 80

[Immelman]

How about that micro-mesh stuff used on plexiglass windows? Maybe better to try it out on somehting you can sacrifice, first.