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Old 10th Feb 2022, 7:39 pm   #1
Nanozeugma
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Default Paint - Diffusion Glass.

Evening all

I need a bit of paint advice...

The Philips 170A/15 radio receiver (1946) uses a piece of glass between the
scale illumination lamps and the glass tuning scale itself.
This is described in the manual as the "diffusion glass."
In every one I've seen, the white paint with which this piece of clear glass is
sprayed is flaking off.
You only have to breathe on it to get a shower of paint dandruff everywhere (!)
The glass itself is nothing special, smooth and shiny like window glass with
no "key" for the paint whatsoever.
It appears it was sprayed on both faces and all edges.
The paint (what's left of it) has a matte appearance and must, of course,
permit the light from the scale lamps to penetrate sufficiently to provide
an illuminated white background to the tuning scale.

Any thoughts and / or suggestions?
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Old 10th Feb 2022, 7:55 pm   #2
Nickthedentist
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Default Re: Paint - Diffusion Glass.

Just a thought but you can get aerosol “frosting” for glass.
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Old 10th Feb 2022, 9:26 pm   #3
Bazz4CQJ
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Default Re: Paint - Diffusion Glass.

You'd have to think we could be in a "Goldilocks" scenario; the gap between too much or too little could be narrow, and it's just a matter of trial an error. Having clean glass to start with will be critical.

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Old 11th Feb 2022, 12:17 am   #4
G.Castle
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Default Re: Paint - Diffusion Glass.

This may appall your sense of originality but I had a similar problem but ended up cutting a section of diffusion sheet fro an old broken LCD TV backlight that a friend gave me, works very well and gives a nice even spread.
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Old 11th Feb 2022, 9:52 am   #5
kellys_eye
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Default Re: Paint - Diffusion Glass.

We have just finished applying a 'frosting' sheet to a glazed door to obtain some privacy. It is semi-self adhesive and works very well - if you can keep the bubbles from forming! Yes, there is a technique using a soapy water spray but we were doing a full sized door and Mrs k_e thought she could do it without the spray....

Either way, a smaller piece of glass would be a breeze. If the OP wants some of the 'left overs' I could pop some in an envelope?
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Old 11th Feb 2022, 12:59 pm   #6
Nanozeugma
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Default Re: Paint - Diffusion Glass.

Quote:
Originally Posted by kellys_eye View Post
We have just finished applying a 'frosting' sheet to a glazed door to obtain some privacy. It is semi-self adhesive and works very well - if you can keep the bubbles from forming! Yes, there is a technique using a soapy water spray but we were doing a full sized door and Mrs k_e thought she could do it without the spray....

Either way, a smaller piece of glass would be a breeze. If the OP wants some of the 'left overs' I could pop some in an envelope?
Thanks for that thought. I've just ordered a suitably sized length from a certain popular e auction site to have a dabble...
Thanks for the offer of offcuts, much appreciated but I won't trouble you
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