I just purchased some polyurethane paint, which I was told I can use on
my guitar body. I do not have a sprayer, so I was wondering if there
is any special technique for brushing this on, and what preparation is
necessary (the body is unfinished, and made from alder). Also, if
anyone knows somewhere with a sprayer that I can send my guitar body to
be painted (with the paint I purchased), please let me know. Thanks!
On 1 Jun 2006 11:29:36 -0700, firstname.lastname@example.org wrote:
Polyurethane is a poor choice for a guitar finish. Nitrocellulose
Lacquer is very much preferred. You can buy it in spray cans from
places like Luthiers Merchantile, Stewart McDonald, or Allied
Lutherie. All have websites where you can order it. The "lacquer" you
find at paint and automoticve stores is not the same thing, and will
never harden enough. It must be Nitrocellulose Lacquer.
On Thu, 1 Jun 2006 15:01:43 -0500, email@example.com (m Ransley) wrote:
Alder is a very common wood for solid body guitars. Most of the Fenders were and
still are made from Alder. It gets used because it is inexpensive, easy to work,
is medium weight, and takes stains and finishes well. In other words, it's good
for production. The drawback to a natural or stain finish on Alder is that it
has a very unexciting grain. There just isn't anything happening. That's why
Fender painted most in solid duco colors that were bright and snappy, and when
they had a pieced body that didn't have blems, they would do a sunburst to make
up for the lack of personality in the wood itself. Alder trees don't grow very
big, so all of the Alder bodies are glued up from pieces.
Terry & Skipper, Clearlake Texas
Spraying 2 part polyurethane is a rather more specialized art than most who
have never dealt with it might believe. Anyone who does it will likely
have their own preferred materials and you would be better off to let them
go with what they know than provide them with something which may be
unfamiliar to them.
There are also toxicity issues--if you are going to spray multipart
polyurethane do it either in a NIOSH-approved spray booth or outdoors with
the wind blowing it away from you or using an air-supplied respirator with
the air intake in a location not exposed to the vapors. The thing is, many
people can spray it without these protections and get away with it, but if
you are one of the unlucky ones who is sensitive to the components, it can
cause a reaction that requires _prompt_ medical attention lest you die.
And the fact that you got away with it yesterday doesn't mean you'll get
away with it today--exposure can cause one to become sensitized if one
wasn't before, once saw a guy who had been spraying it every day for 20
years with no trouble have to be rushed to the hospital one day and he
couldn't be in the same room with an open can of the stuff after that
without going into shock.
As for brushing, if it's one of the formulations that is specified to be
brushable then yes, you can brush it. If not then you can try but I doubt
that you'll like the results.
Surface preparation should be in accordance with the materials provided by
the manufacturer of the coating--most have application data on their Web
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