I plan on using your rust encapsulator to basically undercoat the underside of my rv. The diesel engine’s oil pan and exhaust header from the engine has rust forming and also needs some help. Parts of the engine area and underside are in hard to reach and would need to be done with a spray can. I would remove as much scale as I can but if it doesn’t look fantastic thats ok. I just want to stop the rust!!! Would the rust encapsulator do the whole job or do I need something different for the exhaust header.