I have just been converted to using Salt-Away for flushing my outboard and washing boat and trailer. I have to say that I was pleasantly surprised at how well it worked on removing the build up on my trailer which is aluminium.
My question is when you fill up the mixer to wash the boat the mixer bowl obviously gets diluted as you are using it at so at what stage do you stop washing, drain the bowl and refill with fresh solution? Because eventually the bowl is only water.