Hi,there is no "conventional" place to buy this lime
you can use regular type-s lime from home depot
you can find the video on how to prep it here:
http://youtube.com/frescoschool
however you really need a lime putty - you can buy it here:
http://www.FrescoShop.com
http://www.truefresco.com/frescoshop
also it will save you loads of time and anquish if you watch this DVD to learn about specifics of Fresco Plaster
http://www.truefresco.com/frescoshop/product_info.php?products_id=45
learn fresco at http://FrescoSchool.org
fresco painting video tutorials: http://www.FrescoSchool.com
also visit
Fresco School Video Channel
http://youtube.com/FrescoSchool
Contemporary Fresco Gazette
http://trueFresco.Org
commission fresco or mural http://iLAdesigns.com
admin
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Contemporary Fresco Painting Resouce Center
http://TrueFresco.com