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Re: cleaning an aged garage floor for painting

To: "Keith Turk" <kturk@ala.net>, "Robert Munn"
Subject: Re: cleaning an aged garage floor for painting
From: "Steve Hammatt" <gsteve@hammatt.com>
Date: Wed, 10 Sep 2003 19:05:14 -0700
Keith
What are the options for a 'natural' concrete finish for garage floors?
I've seen some floors that appear polished, some that are near black in
color, etc.
Thanks
Steve Hammatt
Mount Vernon WA USA

----- Original Message ----- 
From: "Keith Turk" <kturk@ala.net>
To: "Robert Munn" <Robert.Munn@peregrine.com>; <shop-talk@autox.team.net>
Sent: Wednesday, September 10, 2003 5:55 PM
Subject: Re: cleaning an aged garage floor for painting


>
> Rob
>
> I seem to have taken up residence as the local concrete expert.... ( could
> be cause I own a concrete business... hmmm )
>
> I have not read the instructions for painting a floor... and would submit
to
> thier expertise before my own... follow thier instructions... not mine...
>
> So with all that said here is what I know...
>
> 1. If you paint that sucker... your going to maintain that paint as long
as
> you own the floor...  no issues with that as long as you want to maintain
> concrete... which requires No maintenence. ( keep in mind Rob... since
it's
> been painted before someone else made this decision for you )
>
> 2. if they require you clean or etch the floor remember it will never
again
> be a quality non-etched slab...  to determine if it was prepared with
acids
> before inspect the surface structure closely.... if you can see sand
grains
> it's most likely been etched with some level of acid.
>
> 3.  Acids are not bad for the actual strength of the floor they only break
> down the very surface of the concrete to give it teeth the paint can
adhear
> to....  the most common acid is Muriadic ( sp and no my spell checker
isn't
> up on this machine )  The level of strength is directly proportional to
how
> much it is diluted prior to being poured on the floor.... Rinsing the acid
> off immediately instantly dilutes the acids.... ( I use this stuff all the
> time without a mask... but only in a VERY VERY well ventilated area )
just
> keep in mind your going to have to FLUSH Muriadic acid with Lots of
> water.... don't try keeping anything dry...
>
> 4. I have had a large front porch that I took the paint off of with paint
> stripper and a pressure washer.... without destroying the surface of the
> concrete with acids.... seems the previous owner didn't prepare the
concrete
> up front and the paint was peeling....  Perfect... now the concrete looks
> great....
>
> Keith
>
>
> ----- Original Message -----
> From: "Robert Munn" <Robert.Munn@peregrine.com>
> To: <shop-talk@autox.team.net>
> Sent: Wednesday, September 10, 2003 6:59 PM
> Subject: cleaning an aged garage floor for painting
>
>
> >
> > I recently bought a 40 year old house with a well-worn garage floor. The
> > garage was used by the owner of the house as her shop for basket-making,
> and
> > was occasionally used by her son for car repairs. The floor has numerous
> old
> > oil stains, duct tape remnants, and the remains of green garage floor
> paint
> > that looks totally trashed- chipped, faded in many spots, totally gone
in
> > others, still somewhat ok in a few areas.
> >
> > I would mostly like to use the garage as a shop, though I might
> occasionally
> > park a car in there.
> >
> > I have read through many threads in the archives here about painting
> garage
> > floors with epoxy for a tough finish, but I didn't see any posts about
how
> > to prep an old floor. I did see that proper prep is EVERYTHING, so I
want
> to
> > make sure I get this right.
> >
> > One person referred to using a concrete grinder to grind off the top
layer
> > of concrete and gunk in extreme cases. Is this my best/only option to
> > properly prep the surface? The last thing I want is to do a bad job and
> have
> > the whole thing peeling and bubbling in a few months.
> >
> > I live in San Diego near the coast but high up away from the water
table,
> > temperature and humidity are moderate year-round.
> >
> > Any thoughts are appreciated.
> >
> > Rob Munn
snip

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