I have a Hart steel straight razor and was never able to restore the edge myself using a 4k then 8k wet stone. I always had to send it off to someone in the UK,

I have a Hart steel straight razor and was never able to restore the edge myself using a 4k then 8k wet stone. I always had to send it off to someone in the UK, which made the whole thing untenable; maybe I should try this polishing film?