I always use a rust inhibitor/remover first such as Kurust, also a Hammerite product. You can see the rust has gone then before you apply protective paint.

Last edited by Richard Wood; 23/10/19 12:11 PM.
Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone