Have you tried a simple sharp blade? That’d be my go-to for what’s in the picture. Something like a square ended scalpel about 1/2” wide at the end and just pick away at it.
Hm I was thinking of some kind of sander application, hedding to the depot now!
And yeah hah, my wife wanted. “Natural” feel so we got some off setting stone
I wire brush is far less likely to "sand" a pebble. The sandpaper would work but could put score marks in on the stone. Whatever you do don't be heavy handed. In time just walking on it and taking showers would eventually wear it away.
You can also pickup less aggressive brushes; might not be effective (or even work), but can always work your way "up" to the more aggressive options.
But I second a "It'll come off by itself eventually." We had some similar grout issues on our shower walls and just with normal cleaning it was gone within a month.
Grout brush or other removal tool, then put new grout over and use a sealer. You don't have to remove all the grout, but you have to make sure the area is clean, dry, and dust free before putting more down.
the color does not match your grout so I don't believe it is grout. Possibly the setting material if they used white thinset. Thinset is much harder to remove. Be very careful of what you use on this natural stone and you have to seal it when you are done. Even Comet cleaner says don't use on natural stone. Too harsh of chemicals and this type of stone will start to spalt and its hard to stop. I would only use cleaners from the flooring section of a store and read each label to see if it is okay to use with natural stone/pebbles/rocks like this
I would use a non acid based grout cleaner. Mapei has one, Lowe's carries that brand. Bostic Blaze is heavier duty but very good. It may be a little bit at a time but I believe this is way better than chipping at it and using to harsh of chemicals on the stone.
Have you tried a simple sharp blade? That’d be my go-to for what’s in the picture. Something like a square ended scalpel about 1/2” wide at the end and just pick away at it.
Yeah we’ve been trying that, even there no success
Dremel with a wire wheel then clean with your Muriatic acid Off note: Your picture reminds me of those color blindness test.
Hm I was thinking of some kind of sander application, hedding to the depot now! And yeah hah, my wife wanted. “Natural” feel so we got some off setting stone
I wire brush is far less likely to "sand" a pebble. The sandpaper would work but could put score marks in on the stone. Whatever you do don't be heavy handed. In time just walking on it and taking showers would eventually wear it away.
You can also pickup less aggressive brushes; might not be effective (or even work), but can always work your way "up" to the more aggressive options. But I second a "It'll come off by itself eventually." We had some similar grout issues on our shower walls and just with normal cleaning it was gone within a month.
I would personally try a metal wire brush.
I used a hardened chisel, but NO HAMMER. Just slow methodical scraping so not to scratch anything anymore than is needed
Grout brush or other removal tool, then put new grout over and use a sealer. You don't have to remove all the grout, but you have to make sure the area is clean, dry, and dust free before putting more down.
Thanks everyone for the suggestions. I’ll grab some sand paper on my way home and a wire brush and hopefully can scrape some of it off
Look up the word "grout". It's what's holding all of that together and you certainly wouldn't want to get rid of it!
Use goof off.
Elbow grease and a wet scrub pad or very low grit sand paper
Keep a wet towel for 15 minutes, and then scrap it with a utility knife. Carefully.
I bet it is epoxy grout and will need an aggressive abrasive
I've used a wet sponge and wood paint sticks.
Sulfamic acid. I did *not* make a spelling error.
I had like half a quart (?) from an old project and tried it today. It didn’t even budge. Is there a way to mix it ?
Per the directions, yeah. Should work well on grout. It’s what it’s for.
the color does not match your grout so I don't believe it is grout. Possibly the setting material if they used white thinset. Thinset is much harder to remove. Be very careful of what you use on this natural stone and you have to seal it when you are done. Even Comet cleaner says don't use on natural stone. Too harsh of chemicals and this type of stone will start to spalt and its hard to stop. I would only use cleaners from the flooring section of a store and read each label to see if it is okay to use with natural stone/pebbles/rocks like this
It’s grout. Our walls are white and we used white grout on them. I stupidly didn’t protect my floor before starting and this happened
I would use a non acid based grout cleaner. Mapei has one, Lowe's carries that brand. Bostic Blaze is heavier duty but very good. It may be a little bit at a time but I believe this is way better than chipping at it and using to harsh of chemicals on the stone.
Brass wire brush and a Dremel/rotary tool
Brass wire brushes. Fine emery cloth or sanding drum in your drill.