Editor’s note: As we read in PCI’s October issue, Saul Vance had formulated a coil coating formulation that passed MEK double rubs in the lab when formulated with a fluorosurfactant flow control additive. But, when this additive was replaced with an acrylic flow control additive on the coil line, the formulation didn’t pass MEK (Methyl Ethyl Ketone) double rubs. Why did this change result in poor MEK double rub results? How did Saul’s boss, Wyatt Walsh, know that Saul’s formulation didn’t have the required crosslink density?