Yesterday I shot a roll of Ilford B&W HP5 (ISO 400) - pushing it to ISO1600 - using my old 35mm Centon camera (50mm lens).
Today I split the film into three different development tanks and processed each film section with the following developers.
Sink taps - Microphen (fine grain)
Wine bottle - Perceptol (speed-enhanced; not recommended)
Kettle - Ilfotec (general purpose)
These images have been scanned from negative as I didn't have time to complete the prints in the darkroom. I think the differences in the results will be clearer on the prints but, looking at the negatives through the eyeglass on the lightbox, i think I like Perceptol best. Although it's not recommended, I am quite partial to the grainy result that it produces. I will confirm my findings after I produce some prints.