On Oct 28, 6:04?pm, " JimH" ask wrote:
"Chuck Gould" wrote in message

ups.com...





On Oct 27, 10:44?pm, sherwindu wrote:
After pulling my boat from the Root River in Racine Wisconsin, I noticed
that
there
was an ugly band of black gunk at the waterline, especially at the
upstream side
of
the boat when it was in the slip. A power wash got the mud off, but this
band
of
gunk stayed on. I had the same problem last year, and had to rub like
hell with

all kinds of cleaners to get it off. Someone recommended using Tidy Bowl
as a
cleaner, possibly because it contains Muratic Acid. I know that Muratic
Acid is

used to clean and etch concrete, so I was wary to use it on my fiberglass
hull.
Was I correct about this? Is there a better way to clean off this river
junk?
I
have used Zud and other similar products, but they don't get everything
off and
require a lot of elbow grease. Some of this gunk is on the bottom paint,
as
well,
so I have to be careful not to dissolve that.

Sherwin

You might try this stuff:

http://lat43.com/marine.html

Absolutely non-abrasive, and cleans far better than any thing else I
have ever used.

It is not about cleaning........it is about removing a built in stain. ;-)- Hide quoted text -

- Show quoted text -

Maybe I misread the description. Sounded like after be blasted the mud
off with pure water there was some "gunk" remaining on (rather than
imbedded into) the hull.


"After pulling my boat from the Root River in Racine Wisconsin, I
noticed that
there
was an ugly band of black gunk at the waterline, especially at the
upstream side
of
the boat when it was in the slip. A power wash got the mud off, but
this band
of
gunk stayed on."