I would suggest using a little more sanitizer prior to developing the infection!
Sorry for the smart ass remark. I could resist, but I didn't want to.
Unfortunately it will not work. The white layer on the top is a 'signal' or symptom, but it signifies a larger issue 'below the surface', both literally and figuratively. You cannot get that bad stuff out of the beer.
In Process - Russian Imperial Stout, Nelson Sauvin Rye IPA, Mild No.3
In Kegs - Barley Wine, Apfelwein, Wild BlackBerry Wheat, Coffee Oatmeal Porter
Gone - so many :(