We did it through T3 45B for 厨櫃做一項磨光防水工程 cost also $1800 for a D unit kitchen. They spend about 4 hours working on the kitchen the surface now is much smoother than before and kitchen sink is much less prone to stain. But in order to keep it in "like new" condition we have to exercise common sense (e.g. don't scrape the surface) also wax it with Pledge regularly.