|[AMRadio] Paint Filler|
mark.k3msb at gmail.com
Mon Jan 6 08:18:51 EST 2014
The knobs on my SX-28A need filled, but the shine is already gone. Is
there any way to restore the shine (noting you did use the word
“permanently” in your post) ?
73 Mark K3MSB
Sent from my Android phone
On Jan 6, 2014 12:23 AM, "Donald Chester" <k4kyv at charter.net> wrote:
> I purchased "Lacquer Sticks" from Antique Electronic Supply in Tempe AZ,
> Tubesandmore.com. They were available in white, gold and maybe some other
> shades. Similar to white wax crayons, including the paper jacket and
> texture of the marking agent, but the stuff smelt more like paint. I think
> I still have mine, but they may have dried out by now.
> I used them to fill in the scales on old Bakelite dials, like the National
> type A and dials from 1920s era TRF receivers, and after more than 20
> years, the paint hasn't flaked out. I would mark over the scale, then
> carefully wipe away the excess with a soft cloth, like an old T-shirt.
> Sometimes it took several passes to completely fill the impressions but
> completely remove excess on the rest of the dial, since wiping off the
> excess sometimes removed some of what was in the grooves.
> Not sure if they still sell it, but look up their web page to find out.
> A possible substitute would be to pour out a few drops of white oil-based
> paint, and let it sit exposed to the air, until it thickens to a gummy
> consistency, then use it like the lacquer stick described above.
> A couple of notes of caution, speaking from experience: when renewing
> those old dial scales. NEVER use a sharp metal object like a steel pin or
> the point of a nail to remove the old paint. It will scratch the
> engravings, and that damage is very evident when the new filler paint is
> applied. Use a sharpened toothpick or piece of plastic, something that is
> softer than the Bakelite on the dial. If you are the least in doubt, test
> on the back side of the dial, and if the point leaves a scratch, look for
> something softer.
> And never use an agent like 409 or Fantastik to clean the dial. It will
> dissolve and wash off the skin from the Bakelite, exposing the filler
> (probably fine sawdust) and permanently remove the shine.
> Don k4kyv
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