Re: [Paddlewise] Dead Reckoning Accuracy (deck marking)

"Michael Daly" <mikedaly_at_magma.ca>
Subject: Re: [Paddlewise] Dead Reckoning Accuracy

On 5 Jun 2004 at 13:51, Bob Volin wrote:
> The acetone does remove permanent ink, but it would be more
> conservative to use a grease pencil (china marker) for the same
> purpose.

There is a "china pencil" available from drafting supply
stores..."Aquarellable" or somesuch.  It works well for writing on wet
surfaces, or when wet itself.  Easier to clean than a china marker or
grease pencil.

Mike wrote:
>I agree - acetone is nasty stuff and I don't use it at all.  Even for 
epoxy work, I prefer to make do with vinegar than use acetone.

You thin epoxy with vinegar, or just for cleanup?

>Divers use plastic boards that can be written on under water.  That 
is also a possibility.  One of these days, I'll find out what the 
plastic is and find a cheap source.  Ditto the type of marker.

Here's the secret:  it's rough.  Rough enough to scratch the tip of the
pencil and leave a mark.  Hard enough that the pencil doesn't scratch
or groove the slate.  Cheap source:  Lexan/polycarbonate works pretty
good (scuff it with sandpaper first).  Fiberglass also works
good--there's a fiberglass reinforced panel on the market that is often
used in fast food and convenience store restrooms--the back side of
this material makes a great water slate.  The front side would probably
work well, too, if you sanded off the glossy pebbled surface.

Diver's "secret":  when elbow grease or thumb oil isn't enough to
remove days' worth of writing on the slate, use toothpaste.

Rob G wrote:
>A grease pencil works really well and comes off with minor elbow
grease and water.

I suspect this is why they're called "grease" pencils?

Shawn
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