Yes, if you are working with a more coarse stone or finer sandstone. It makes a larger difference than you think. With a high-gloss granite or marble, it will often make a smoother sandstone, while if you go down to a less-fine, softer stone it can make a much rougher sandstone to finish. I’ve had sandstones that were about the same size as, say, an eggshell, and one that was so rough that the edge of the stone became like a rough, knobbly pencil! Sandpaper is just an amazing tool in that it offers a variety of options. Sandstones should never be sanded to a finish, you will not get great results with a finish. I would recommend using a hard roller with a light sand paper and a buffing wheel. In any case, there is a fine line between keeping a stone looking great and making it hard.
Treating stone with wax
I’ve seen comments that this is the best and only way to go. I’d actually feel the same about that! The wax helps the stones absorb moisture from the air and keeps them soft and smooth.
I would recommend only using wax on hard stone and not stone at all. It’s better to use a mixture of water and wax. With soft pebbles, this process is easy and the stones are usually soft and smooth. When hard stones get wet (a lot) this process will be slower and you really miss out on the advantages of wax on solid stone. After about 4 weeks or so the wax will be broken down and the stone will be softer. But, if you want a smooth finish, leave the stone alone to dry.
The other downside is that you need one or two thin layers of wax for each coat of stone. This makes it very hard to leave the stone on at the end of the day. You also need to add some wax to your stone before you apply the final finish.
Wax is very effective on sandstone but hard stones aren’t really great when it comes to waxing because you will need a lot of wax and will have to use it many times. If you keep a rock dry and never leave it to dry out, you will get more results by using a little bit on each coat of stone.
I recommend using a water resistant finish. For regular hard stones, I would recommend using an acrylic finish. That is the best available. A good quality acrylic stone will not have any
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