Posted: Tue Aug 02, 2016 1:16 pm
You need to use a sealing & coatings remover for this, so something like Mira Strip (have given details on another thread for someone) you can scrub it but I use a floor buffing machine on Limestone (and other natural stone when needed) medium to soft brush attached so I have the scrubbing agitation working for me, yes honing powder might take off the surface of the sealer, but you still might have residues of the previous sealer in the stone, hence the sealing & coatings remover.Tony McC wrote:How would you advocate stripping the sealant, Roger? Scrubbing with xylene?
And you mention re-honing. Wouldn't this remove any sealant as part of the process?
I've not seen re-honing in-situ, so it intrigues me. I did oversee a sand/grit blast clean-up and the guy in charge was adamant that the sealant had to be removed first before blasting could take place, but couldn't explain why other than the usual "coz that's how we do it" reasoning.
I use the Mira strip and honing powder together and start with 220 grit then 400 grit.
You really want all the crap sealer removed so a decent impregnating sealer doesn't hit any residues of the (usually acrylic ) old sealer when re-sealing, as you can again have another headache.
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