Scott Dorsey wrote:
Norm VE3CZI wrote:
I recently acquired a nice 1950 shortwave receiver but has been exposed to a
tobacco smoker during it's existance.
Anyone have good method of removing the film without damaging decals on
front panel?

Depends what the decals are.

Ammonia will remove a lot of tobacco smoke, and it's very easy on most panel
surfaces.

Formula 409 is a lot more effective. It will be fine on silkscreened paint
although it can take some lettering off so try it on a small corner first.
I have used it to turn broadcast equipment from bright orange to white. It
is very powerful stuff and you should be careful with it. It will etch
bakelite, by the way.

Another solution is to take up smoking, especially cigars. Then soon all
your equipment will match.
--scott


Does anyone know what Formula 409 consists of as it is not in my
supermarket or chemistry book? Is it just a local product in one country
or maybe it is just acetone, alcohol or methylated spirits under a fancy
name?

Thanks for any help.

Simon