Can cultured marble be repaired by me?

There are products on the market to resurface without removal but you need to remove the plumbing and etch the surface with strong acid, not something that I would recommend trying for first timers. Good news is that there are several companies that do this and have the kind of experience and tools to do it right

My first thought was that if this is a standard size I would just replace it. These sinks are not a lot of money and styles do change. The blue and white vanity sink I installed around 1980 would be a blessing to change for something less dated in appearance.

Did a quick search on line. These may be cracks from thermal shock from dumping boiling water in the sink, but scratch or crack doesn't matter. There are people who will come to your house and refinish the sink and there are kits that will allow you to do repairs yourself for less than $50. On the other hand, if this vanity is 37" or less in width, there are choices for under $100 at your local home improvement store. Less work than repairing this one and no question that it will look good when you are done.

You might be able to do a faux finish or a feather concrete finish to resurface it. There are several tutorials on this site and around the web. Unfortunately, you are not likely to get a good match for the finish with repairs, but you can fill the scratches and then disguise the repair. Search for "feather finish concrete" or "faux finish painting on vanity top" and you should get several useful suggestions.

Cheaper to replace than to repair. Any repair will not last.

Do you know this for a fact?

Teresa Smith, faux marble tops are around $100 for a small vanity top with integrated sink. You can certainly paint it for half that. But vanities take a lot of wear. A painted surface won't last as long as a new top, unless you are extraordinarily careful with it.

If it's a bathroom that gets a lot of use, has spills of nail polish or puddles of soapy water left behind, your better option in the long run is replacement. If it is a light use powder room typically used only for a guest or an occasional handwashing, a faux finish or feather finish could last for years. A repair is harder to evaluate. I have not seen home repairs of the original surface that I thought would last, but I can not speak from personal experience.

Hello. I’ve had these small cracks in bathtubs and chips pitting in the sink.

I don’t think there’s a way to repair them and have them to be visually pleasing.

In the case of the white fiberglass tub I used epoxy putty and because of the repair it was not smooth sanded smooth and the repair defect was quite visible. In the sink used to pumice stone which scratches more the but it helps remove the stained discolorations and calcium build up around the deteriorating area.

These diy kits to paint bathtubs are quite expensive and potentially not cost-effective for your smaller repair. Perhaps someone who has done their bathtub could guide you about the finish quality and appearance of their project.

These appear to be “failure cracks”.

You could coat it, it will peel off in months.

That would give you time to either save for a new one or buy a better condition used one.