B.estB.roughtC.an thus far this year and I didn't know what it would do being that it was my 1st time using it to remove rusty knob and keyhole..but the application process was a little bit more than expected in general...had a few squeals until its lubricate settled on the right spots after finishing the entered into whole head of the black sutton like formula came off the knob was easygoing and the keys fitted with consistently in the man ager office lastly we rinsed it with water and wiped away the remains to a brand new door

Fantastic product. Works as advertised. Follow the directions and rust will disappear.