A different snake oil question

[Ghoste]

Has anyone ever used one of those home rad flushing additives?  My rad isn't that old and my coolant tends to get replaced once or twice a year but right now while it's empty, I'm just wondering about the wisdom of doing this.

[BigBlockSam]

i took mine to the rad. shop $20 he boiled it and pressure tested it. i painted it myself. Rene

[Ghoste]

The rad is only two years old.  I was just wondering about cleaning the junk out of the block.  It's only got about 5000 miles on it but that's enough for the crap to build.

[Silver R/T]

ya just follow instructions and itll work fine

[Ghoste]

Yeah, but is the stuff legit or is it just snake oil?

[Silver R/T]

ya it works, used by many mechanics