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Removing
Rust During Restoration
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1. A small acid dipping tank can easily be built using
four (4) two by fours. Build a square frame large
enough and deep enough to handle the part you are
working with. You should also use plywood for the bottom
of the frame, and line the box with four to six millimeterthick
plastic. “available at any home depot/hardware
store, black or clear will do”. If you are cleaning a fender,
you can build up the sides as high as you need them with
plywood. |
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2. On this decklid, the paint is very thin with deep,
grainy rust. |
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3. In this step, you want to shave down the remaining
thin paint to clean it up. A liquid stripper is useless on
thin paint that is weathered. Also, sanding will slice the
rust down to help the acid work well.
A variable-speed grinder (1200 rpm) with 80-grit paper
and backing pad should be lightly used over the rusted
area. Just slice the surface, and stay away from the
edges. The edges should be done by hand using 80-grit
paper. NOTE! do not put pressure on the sander/metal
surface or you risk warping from excessive heat.. |
Note: For this application you will need muriatic acid
(swimming pool acid), which can also be purchased from a
hardware store. The average cost is about $2 per gallon. You will
also need litmus paper to test the pH balance of
the solution before disposing of it. Lastly you will need baking
soda to neutralize the solution to an environmentally
safe level before disposing of it. Remember to always use goggles,
gloves and a respirator. When you have finished
with muratic and baking soda stage pour a qt/32 oz of phos-pho or
oxi solve phophours acid inside all panels without
dilluting and let set 1 hour before rinseing out with water. Phosphoric
is also avaialble at any hardware store.
Mixture: Mix the muriatic acid with water - one gallon of acid
to two gallons of water. Submerge the panel you
are working on, and let it sit for three to four hours. Check
it periodically. Mix more if needed. |
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