[R-390] Questions about using a Lacquer-Stik(r)

[jkharvie]

Barry,Given you have a lacquer-stik, i would make some test applications of that material  on a piece of aluminum or steel to first hand assess application, adhesion, how hard it cures, the time needed, and specific chemical resistance, durability etc.I would also indicate if you are going to be using the "putty", "crayon', or "paint" type of laquer-stick.I looked up the name and received quite a large number of products on the market.Engravers crayon is the only type I have applied to my engraved panel that I over achieved with a thermally-fused electrostatically applied paint.I am interested in the results.  John N3JKE

Sent from AOL on Android 
 
  On Tue, Jul 2, 2024 at 10:34, Barry Scott<72volkswagon at gmail.com> wrote:   (Trying from the GMail page as the first attempt from my other email
account was undelivered.)

I'm going to attempt to use a Lacquer-Stik(r) to fill in the engravings in
my R390.  I've read where this product takes weeks/months to fully cure.
Does that sound correct?  I don't mind waiting as I have a lot more stuff
to do for this radio but would just like to know what I'm getting into.

I'd also be interested in its durability.  I presume that once it fully
cures, it's probably fairly tough but I don't know.

I tried using acrylic craft paint for one small area of engravings.  That
was a complete failure.  After letting it dry overnight, I literally washed
it off with soap and water and an old toothbrush!  Not good.  I think model
car/aircraft paint might work but it might be somewhat difficult to wipe
clean after application and it could be aggressive on the paint if there's
much residue.

For prep, after wet-sanding the front panel down to the bare aluminum and
scraping out the engravings, I used Rust-Oleum self-etching automotive
primer followed with two light coats of Rust-Oleum satin enamel.  I let
that cure in the hot sun for a couple of hours for two or three days in a
row which seemed to have a good hardening effect and reduced the
out-gassing quite a bit.  Hopefully that will be durable.

Thanks for any comments,
Barry - N4BUQ
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