Any thoughts on anti-salt solutions for engines?

[Mr. Sandman]

I normally winterized the salt water side of the engine by first flushing the engine with fresh water for a few minutes (ie, running the seawater intake into a bucket with a running hose in it) and then mixing up some antifreeze and let the intake inhale enough (normally a couple gallons) until I see it coming out of the exhaust.
This normally works OK for me but I was reading about how salt builds up in the engine and there are a few products out there that are suppose to dissolve the salt. Have any of you guys tried this? Do you think it works? In theory it should keep the efficiency of the heat exchangers close to new.