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Epoxy paint removal from in-situ purlins

I have a need to remove a failing paint system from sheet rails and purlins in a completed steel shed. The paint is a PU finish over an epoxy base coat on a standard galvanised member. Gauge 1.5 mm.
Is it possible, or practical, to consider sweep blasting the members to remove the paint? Will this damage the galvanizing and the member itself? I understand that shielding will be required to protect the cladding.

John Pyper
consultant engineer - East Grinstead, Sussex, UK
September 15, 2011

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