Pigeon droppings

I recently posted a query on the Distlist on how to clean the stains
left by pigeon droppings on an internal limestone (Conservation
DistList Instance: 18:39 Friday, February 18, 2005). I have
discovered a product called Klenzyme. It is an aqueous enzyme
preparation produced from microbial fermentation of a Bacillus
species, buffered at pH 8.0. First the area is sprayed with water
and then the product sprayed on. After 10 minutes or so it should be
hosed off. It is totally safe to use and biodegradable and will
remove traces bird excrement and traces of white staining normally
left behind by other cleaning systems. I wondered if any stone
conservators out there had any feelings about the use of this
product in the field of conservation?

Paddy Connor
University of Lincoln
UK


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                  Conservation DistList Instance 18:51
                  Distributed: Tuesday, April 26, 2005
                       Message Id: cdl-18-51-018
                                  ***