[MassHistPres] Cast Iron Restoration

[Jonathan Feist]

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



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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