We have blown canister air filters out on our farm equipment every morning during routine servicing before going into the fields for years. The filters are just larger versions of the Donaldson filter. Tractors, Pickers, and combines suck in an enormous amount of dirt in one day. We changed the filters out monthly, but they would be blown from the inside out many times before being replaced. Also blow across the outside of the filter never directly into it from the outside. Put several thousand hours on those Diesel engines without any issues. I blow the filter out on my mower as well. Not suggesting I will get 8 to 9 thousand hours out of the engine, but I am hoping to get at least 1 thousand from it.