How reliable are rust converters?

[Ndoxonani]

I have the Mar-Hyde rust converter. This isnt a showroom restoration so I was planning to wire wheel the entire underside of the car, spray the rust converter, then epoxy, then bedliner as undercoating. Just curious if anyone has ever used MarHyde or POR15 and painted over it. How did it turn out?

[tigcraft]

It’s a strange question on a motorcycle forum but your answer is these converters work but the person who applies it needs to be able to make the metal squeaky clean to a very high standard then double coat the metal then scotch surface and etch prime then paint with whatever. Most DIYers fail because they don’t get how clean it needs to be for the converter. This good enough answer?

[Puffs]

A+