I think Hammerite is good stuff but it isn't the shortcut to rust treatment that is often suggested.
I used to get the sprayable Hammerite smooth but it didn't seem to work at killing/neutralising rust, and the aerosols clog.
It is a good tough paint for brushing onto Chassis rails, floors, sills etc. with at least 2 coats, but if it is going over rust then a coat of Zinc primer makes a big difference to the time it takes for the rust to come back through.... IMO.
I didn't know that about the silicone.
I used to get the sprayable Hammerite smooth but it didn't seem to work at killing/neutralising rust, and the aerosols clog.
It is a good tough paint for brushing onto Chassis rails, floors, sills etc. with at least 2 coats, but if it is going over rust then a coat of Zinc primer makes a big difference to the time it takes for the rust to come back through.... IMO.
I didn't know that about the silicone.