I am trying to flamex synthetic drape panels using Roscoflamex S33 as directed, undiluted, using a hudson sprayer with medium nozzle on the back of the fabric, not immersion, as tests to a sample showed bleedthrough and residue on the face of the fabric. When I apply it, some areas immediately splotch dark. I am guessing it is due to a reaction between the acid dye base in the fabric and the alkaline flamex. Anyone experience this? How to solve?