I would say it is the acid rather than the brush. Try to remove the damage with the brush and no acid. Then work up to a finer grit brush. You may nee aluminum oxide but it is so messy. Sealing: I have always had success with 511 Impregnator in bringing out the color without it being too dark.

Sent via BlackBerry® from Telstra

From: Walter Nartowicz <walter@midatlanticstonesolutions.com>
Sender: wnartowicz@gmail.com
Date: Fri, 28 May 2010 12:11:48 -0400
To: Restoration and Maintenance<sccpartners@stoneandtilepros.com>
ReplyTo: "Restoration and Maintenance" <sccpartners@stoneandtilepros.com>
Subject: [sccpartners] slate dusting

Hey guys,
I am doing a clean and seal job on a slate floor- I'm not exactly sure what type of slate it is, only that it is a blue/grey color with a little bit of texture to it. We've acid washed it with a green nylon scrub brush. The cleaning process is causing quite a bit of slurry, I believe due to the aggressive brush. Normally I could put a nice solvent based color enhancing sealer on it and it would take the chaulky look away. In this case we are limited to using an immpregnator sealer which leaves the slate with the chaulky look which the customer is unhappy with. Any ideas on how to get rid of the chaulkyness?

Jim Corron
Mid Atlantic Stone Solutions
4607 Fayetteville Road
Raleigh, NC 27603
919-772-2155 (Main Office)

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