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Subject:
Blasting Media
From:
John Leeke <[log in to unmask]>
Reply To:
BP - "That's gneiss but I think you're full of schist!"
Date:
Sat, 3 Jul 1999 09:24:17 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (24 lines) 
Ken:

I had a contract to be the historic building specialist when the US Army
(CERL) was testing some paint removal methods at Ft. Benning in Georgia on
the General's Quarters, a 19th cen. plantation house. We tested a shredded
foam rubber media that had abrasive grit imbedded in it. (Brand name:
Sponge-Jet) This media required special equipment developed by the
Sponge-Jet company.

Like most blasting methods I have encountered, damage to the wood substrate
was substantial, especially where it was bare to begin with, or where chips
of the thick paint buildup came off early in the blasting process.

John

John Leeke, Preservation Consultant

publisher:               Practical Restoration Reports
contributing editor: Old-House Journal
postal:                    26 Higgins St., Portland, Maine  04103, USA
phone & fax:           01 207 773-2306
email:                      [log in to unmask]
website:                  www.HistoricHomeWorks.com

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