If its got a coating on it you may consider starting at a 120 metal first then 50 resin. Sometimes the resins like to float on top of the coatings.  

Sent from  Randy Frye at Cleaning Edge 

On Feb 23, 2012, at 8:15 PM, "Mike Marsoun" <nulifesc@bigpond.com> wrote:

Have to do a grinding job, it has already been flattened but then the guy came in and acid washed it very strong to make it non slip, then coated it, now it looks like it was supplied as brushed finish. I will start with 50 resins.


This also has sanded epoxy grout. The grout is now a touch higher in areas because it did not get eaten away with the grout, so it will be sanded to flatten again. Does anyone think I should worry about scratches from the sand because it is EPOXY grout? Wondering if it should all be replaced before I start.  Or, after the 50 resins,  blade over it with a clear epoxy to consolidate the grout. Wondering how this epoxy will sand off, if it will happen with the resins, if the epoxy is kept to ½” in width.  

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