I use Pyrocat-HD with a three minute presoak. The presoak removes all the antihalation dye, while the Pyro tans and hardens the emulsion. I use it with all Efke, Adox, and Arista EDU Ultra(Efke) films. I use stop bath diluted 50% normal strength, then a 30 second water rinse prior to using TF-4 fix from Formulary. I have yet to see any scratches or other imperfections with these films(other than curl) and this method.