[MassHistPres] Cast Iron Restoration

[Amy Bauman]

I'm DEFINITELY not an authority on this, but that's the process described to
me by the owner of Iron Works in Somerville.  Get rid of all rust, and seal
the body.

In fact, many of Iron Works' customers like them to keep a little of the
rust ON the body for a more organic feel ... coating it in polyurethane (or
whatever) stops the rusting process in place, as rust needs oxygen to grow.

Hopefully, that's helpful

Amy Bauman
greenGoat

-----Original Message-----
From: masshistpres-bounces at cs.umb.edu
[mailto:masshistpres-bounces at cs.umb.edu] On Behalf Of Jonathan Feist
Sent: Saturday, October 27, 2007 4:16 PM
To: Massachusetts Historical Preservation interests
Subject: [MassHistPres] Cast Iron Restoration

Hello,

There is a proposal afoot to restore the cast iron markers in the Harvard
Shaker cemetery. The method they want to use is:

³We will strip all old paint and rust off with a fine silica sand blast.
Then we will etch the parts with an iron phosphate wash followed by a
stabilizing outgas to force any impurities out of the metal. We will apply
2­4 mils of zinc rich epoxy powdercoat primer followed by 2-4 mils of gloss
white TGIC polyester powdercoat finish coat.²

Does anyone know whether this approach is considered good preservation
practice?

--Jonathan



===============================================

Jonathan Feist, Chair
Harvard Historical Commission
978-772-4864 (home)
617-747-2148 (Berklee office)

Preserve Historical Harvard, MA:
http://www.jonathanfeist.com/Pages/HarvardPreservation.html


New Article: The Habit of Pie
http://www.harvardpress.com/Features/TheHabitofPie/tabid/630/Default.aspx


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