Problem: We phased out our last CFC-degreaser to help patch the alleged ozone hole. Problem: We phased in Probimer 65M which ostensibly has slightly lower adhesion than Probimer 52. Problem: curtain-coated S/M peeling from reflowed tin/lead Our standard surface prep for SMOBC is pumice (no brushes) but pumice dulls the reflow finish and has been rejected by the customer for aesthetics in the past. Customer is high-rel avionics and will likely be a bit stubborn with design change recommendations. Does anyone have a successful pre-clean method for S/M over reflow? a conveyorized solder brite? a non-CFC degreaser? a solvent? Thanks in advance. Joe Felts PC World, Toronto