Hi, I'm looking for some help to get a more finished look on my sink that I've been sanding.

I've been sanding and carving out the basic shape now, but I need some help on how to achieve the final finish.

I have no experience with stone work and this sink is something I plan to use in my new bathroom, but if it doesn't turn out well, I won't be very upset; it's just a fun project really.

Stone sink with rough exterior placed on a yellow workbench outdoors, showing a smooth, wet-looking interior, surrounded by green grass.
A stone sink with a rough finish placed on a workbench in a garden, with a hose and other garden tools nearby.
This is how the stone looks when wet. I want to keep the rough finish on the outside, but in my dream world, I could achieve the same color as when it's wet or polished. I've read that there is some kind of wax or sealer that one might be able to use? All tips are welcome.

Then I'm looking for some kind of sanding tool to at least get a slightly higher finish in the actual basin.

I have, for now, just evened it out with a very cheap diamond cutting disc.

Would I get better results with this type of disc? If not, what should I use?
http://www.jula.se/catalog/verktyg-...deller/sliprondeller/diamantslipskiva-016001/

All tips to improve the surface are appreciated
Stone sink project with rough finish on tabletop, showing carved basin with visible grinding marks. An angle grinder is nearby on the work surface.
 
Unfortunately, I might not have much help to offer: I would recommend some form of polishing wheel for the finish, and maybe wax on the surface - but try it first on a smaller stone if so.

But fun project!!

How much time have you spent hollowing it out with just an angle grinder!?

/K
 
Hi, do you have any suggestions for a polishing pad and wax? That's what I'm kind of looking for, but the products I've tested (which might not have been specifically intended for stone) don't work at all.

I've spent maybe 10 hours so far, and much of it has been trial and error. I've used an angle grinder to make cuts, which I then chiseled out with a chisel and hammer, like this.
Stone on workbench with chisel marks, angle grinder in background, hammer and chisel on side, part of stone finishing project.

Now, I almost only have the tricky parts left to drill the hole and get the final finish! :D
 
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mexitegel and 1 other
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I watched a video a while ago where the samurajen (YouTube) makes a stone sink. It looks like he uses the diamond disc to smooth it as well. I'll attach a link to the video, maybe you can get some tips:

https://youtu.be/wqBjiAJV3aQ
 
It is probably a matter of gradually refining it finer and finer with diamond. In much the same way as with granite slabs, concrete floors, etc.
 
Thanks for all the answers. Bought a nicer diamond blade today and will see if I can achieve an acceptable finish.

Here's a picture of the tap that arrived today, I think it could be pretty cool if I get it right.

Vintage bronze faucet alongside a rustic stone basin on a workshop table with tools.
 
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yonna and 4 others
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Google "rock polishing", someone used a dremel on a small stone, maybe it will work for you too, or with a drill with a flap wheel on it. It will probably use up a few wheels, but it might be worth it if the result is good. ;)
 
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klaskarlsson
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How have you planned for the drainage - do you have a rock drill in the appropriate diameter?

Is the material otherwise difficult to work with - I can imagine it's "stone" hard :)
/K
 
klaskarlsson said:
How have you planned for the drainage - do you have a stone drill in the appropriate diameter?

Is the material difficult to work with otherwise - I can imagine it's "stone"-hard :)
/K
Yep, diamond hole saw is the plan, but I will try to contact a suitable company that might be able to do it instead, the drill costs 400, maybe someone else can do it for the same price.

The stone is apparently harder the darker it is, it was quite easy to work with on the top where it was red but has become harder and harder. I don't think it's been as awful as one might expect. I've had cheap diamond blades and a simple small 125mm angle grinder.
 
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klaskarlsson
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Fantastically nice! Wonder if it can be done with sandstone and if it holds. I will copy this idea straight off =)
 
What a wonderful project! I immediately thought of a profession that works a lot with stone, check with a company that makes tombstones, they should have a lot of tips to offer. For example: http://www.wilastenhuggeri.se/
 
This is how it ended up in the end

Modern bathroom with white panel walls, wooden countertop, stone sink, and grey tiled floor; compact space with a window and plant decor.
 
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Monken70 and 4 others
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Nice job :thumbup:

I was tempted to get a similar one for the summer house in Thailand. It sells there for about a thousand, depending on size and model.

Stone sink basin with a smooth interior and rough exterior, placed on a wooden surface with decorative panels in the background.

Bringing it to Sweden would admittedly be a bit of a hassle to bring on the plane.... :D

//Kepsen
 
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