Dry ice blasting machine - GIF

[Moby Duck]

Didn’t harm the insulation varnish even though there would been contraction of the copper wiring whilst it was all being cleaned. Other paintwork also blasted without any apparent damage. Contractor was a mobile unit and supplied his own compressed air from a compressor on a trailer. I don’t remember it being particularly big but as Hoosiersmoker says it probably used large volumes of air. Blasters of any kind, sand etc, also need lots of air.