I am cleaning the under side of my K5 to repaint. Frame (where visible) axles, etc. There is some grease/oil I have got to remove. I tried some Gunk engine degreaser w/ my pressure washer yesterday. I got quite a bit off but still some there. I have heard that oven cleaner works really well. I didn't know if it would be safe on seals, gaskets, etc. Has anyone tried this stuff?