I've spent a lot of time taking paint and undercoating of frames and panels.,
using different products and methods.
Sandblasting works great with a pressure unit at 85- 95 pounds. However,
sandblasting with such a unit will not be affective on a soft type
undercoating.The sand will simply bounce of this type of paint.
I removed this type of undercoating with thinners, scraping it off with sharp
instruments of any kind.
I've also used the die grinder and the drill with and different attachments
like 3 M roloc wheel and a thin, orange coloured wheel [don't know the name of
this product, but they are sold at all automotive stores]. All work well in
their own way. Widely sold wire brushes which attach to the drill have never
been of any use to me.
Chem stripping is also effective, however, I found some of the very old paints
were very difficult to chemically remove and needed to be sandblasted. I've
used Polystrippa, available at Home Depot, with good success.
Hope this helps.
Liv
----- Original Message -----
From: Larry Vaughan
To: spitfires@autox.team.net
Sent: Friday, August 06, 2004 1:35 PM
Subject: frame again
I've scraped and sandblasted several days and used up the five stripper
discs
I had. The law of diminishing returns has entered the last stages. Some of
the
nooks and crannies retain asphalt type undercoating. The paint under the
yellow topcoat is real thick black paint and a lot of it remains in the
hard
to reach spots.
I have a gallon of oxisolv, supposed to remove rust and leave a zinc
phosphate
coat, and a quart of Corroless. I don't know how compatable the two
products
are or how well they will work on the 95% of bare metal.
Any suggestions appreciated. I thought I might spray the oxisolv inside the
frame and the Corroless on the outside. I just don't know how well the
Corroless sticks to clean, no rust, bare metal.
A company 90 miles from me, will powdercoat for $250.00.
Larry
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