[428ho]

Any idea what to use to get the yellowing off these gauges?

Thanks in advance

 

[MI2600]

I wouldn't try to clean those. You run the risk of wiping the letters right off...trust me, but don't ask me how I know.

I would check Hemmings' gauge repair vendors for someone in your area and let a (hopefully) experienced shop do it.

 

[Streamline55]

i would try some soapy water and a soft bristle tooth brush, i would not press very hard just in case the letters start to come off. i would think that would be the least aggressive way to clean them.

 

[magnum2u]

Cleaning gauge face

I had a set of 1937 ford gauges and after disassembly soaked them in vinegar and than used a q-tip very litely to wipe the face clean it worked great for me. Now these are anodized and painted and yours maybe different so I would only try it on a spot that will not show first.
Mike