Protective Films - Steel and Stainless engineering

I am not sure if I am in the correct forum here but hope that someone can help.

I am currently involved with a project that includes water flowing over a stainless steel (SS316) sheet (approx 1.5m tall x 0.9m wide).

Simple(!), but I have a mojor problem with getting the water to flow over the full surface. I think it is something to do with the protective film that new brushed/mirrored ss has on it. When I remove the protective film, I think somekind of adhesive is left behind. I have used solvent and detergent to remove any adhesive but to no avail. If I try an old piece of stainles that has been in the workshop for a couple of years, the water flows over the full surface of the sheet.

It is like there is some strange surface tension on the new sheet when the film is removed.

Any suggestions greatfully received.

Simon

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