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-   -   Think I have done something stupid (http://www.videokarma.org/showthread.php?t=270492)

Captain Video 05-27-2018 01:10 PM

Think I have done something stupid
 
1 Attachment(s)
What's that on those Zenith radio knobs? I let them soak for hours in a glass with dishwasher detergent and they came out with this yellow goo. Should I scratch this out?

MadMan 05-27-2018 04:26 PM

Is it actually gooey or is it more like a dry haze? Either way, the soap may have leeched something out of the pores of the material... bakelite?

Captain Video 05-27-2018 04:41 PM

I think it is regular plastic, not bakelite. Anyway, as the hours pass it is looking like it is getting back to normal.

Celt 05-27-2018 04:56 PM

abby-normal... ;)

decojoe67 05-27-2018 07:06 PM

I've had certain materials get hazed over with simple cleaning techniques, but I never ruined them completely. They usually can be returned back with a good buffing.

Marco-nix 05-29-2018 10:06 AM

Curiously, I have never had problems with dishwashing detergent . But never put some bakelite or plastic buttons from TV or radio in a dishwasher because it's too hot . I let them soak in a big bowl of hot water and dishwashing detergent only when I'm in no hurry. Otherwise I clean each button in warm water and dish detergent and an old toothbrush or denture brush simply. Yes of course I let it soak for a few minutes.

maxhifi 05-29-2018 10:35 AM

I have found that a dishwasher will remove the gloss from plastic or bakelite buttons and knobs, it's too harsh.

I haven't met a knob I couldn't clean up with warm soapy water, an old toothbrush, and a few wooden toothpicks to clean out the grooves. I like to let them soak a while, and then begin to scrub them. I suppose the same as most others here.

Marco-nix 05-29-2018 10:43 AM

Quote:

Originally Posted by maxhifi (Post 3200144)
I have found that a dishwasher will remove the gloss from plastic or bakelite buttons and knobs, it's too harsh.

I haven't met a knob I couldn't clean up with warm soapy water, an old toothbrush, and a few wooden toothpicks to clean out the grooves. I like to let them soak a while, and then begin to scrub them. I suppose the same as most others here.

It's also what I always use. toothbrush, toothpick and dish soap. With these things I have never had any discoloration problems with my TV buttons or radios. I even clean the plastic radio cabinets, and anything that is plastic, I clean that with dish detergent... Of course, I do not let it soak for hours, but only a few minutes. A half-hour in general is enough

decojoe67 05-29-2018 04:44 PM

Quote:

Originally Posted by Marco-nix (Post 3200146)
It's also what I always use. toothbrush, toothpick and dish soap. With these things I have never had any discoloration problems with my TV buttons or radios. I even clean the plastic radio cabinets, and anything that is plastic, I clean that with dish detergent... Of course, I do not let it soak for hours, but only a few minutes. A half-hour in general is enough

Another good cleaning product to use to clean the knurl/notches on knobs is Novus 1 with a firm small brush. I would recommend the Novus 3 step kit to anyone. It last a long time and does a great job on plastics.

Marco-nix 05-29-2018 07:28 PM

Quote:

Originally Posted by decojoe67 (Post 3200159)
Another good cleaning product to use to clean the knurl/notches on knobs is Novus 1 with a firm small brush. I would recommend the Novus 3 step kit to anyone. It last a long time and does a great job on plastics.


yeah but more expensive than my method....

decojoe67 05-30-2018 08:19 AM

Quote:

Originally Posted by Marco-nix (Post 3200162)
yeah but more expensive than my method....

I agree and thought same thing for years. I had finally given in several years ago and got the 3-step kit. After do many, many radios since then I'm still using that same kit. It seems to last forever. The results you get is so worth the expense if your an avid collector.
I'll reveal a "secret" excellent plastic polish: Maguire's "Plast-X"
It bites into bakelite and with a little elbow grease makes it smooth as glass. I actually us it after Novus #3 and #2, and then a buff with #1 with cheesecloth.

toxcrusadr 06-25-2018 03:50 PM

Really gunky knobs I clean with a toothbrush and either Goop hand cleaner, or a liquid cleanser like Soft Scrub - basically a finer abrasive than Comet and in a liquid form so less abrasive.


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