[Healeys] Chassis - Dipping vs Blasting

Jackson Krall jackson_krall at yahoo.com
Sun Dec 16 17:58:11 MST 2012


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On Sun, Dec 16, 2012 7:18 PM EST Jackson Krall wrote:

>
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>With all the various issues with dip and blast Ive chosen to chem strip my
projects myself in my "studio". I've posted about my use of Phosohoric Prep &
Etch by Klean -Strip(Home Depot $15gal.) in the past but have had recent
breakthroughs worth passing on. BTW the product Larry Varley is using to
derust the Nash Healey appears to be phosohoric based, what he describes is
the same for the product I'm using.
>Old friend is major builder of coating systems for co's like Briggs &
Stratton etc. He says they use a tank of phosphoric acid in the coating "line"
to clean product before coating and that it's heated to 1800f. Much more
aggressive when heated he says, so I've been heating about a cup or so at a
time in plastic container in micro wave and then brush it on. Seems to work
better. I'm going to try using electric crocpot.
>When allowed to dry, the rust turns into the white glaze that is then
removed. Larry describes using a power tool for removal, I've been applying
another hot coating and immeadiatly hand sanding the glaze off using
water,small chisel/screwdriver, various wire brushes and pads cut from the
coarsest sanding belt I can find, usually 36 or 40 grit. When washed off you
will either find clean metal or more rust in which case the process is
repeated. I do a project a panal or section at a time but overlapping them.
>Another way to play it is to keep the rusty metal wet w/the acid do not let
it dry, work the rust with wire brush and sanding pads between coats.
Eventually the rust becomes a black goo that can easily be removed. This way
you have to stay with it, if you let it dry and form white glaze you can walk
away and work on something else.
>So far I've done an entire Bugeye and Jeep chassis as well as many smaller
items.
>I've experimented using a parts washer pump to keep a flow going over a
specific area with plastic catch container below. This dramaticly speeds up
the process but the acid becomes contaminated and foams until it can't be
used, still very useful for some applications. I need to find out more about
the equipment my "old friend" makes to remove the iron from acid so it can be
reused
>This process of rust removal is labor intensive and not fast but if you have
to wait 6 mos. for a date with a dipper, what the hay?
>Best
>JK
>
>
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