Hi Slobodan,

> Now, how do I blend these two surfaces??

I think the easiest way is to let filleting do it for you. If you bring the sides of your sink straight down to meet the bottom in a sharp edge, you can then select that edge and do a fillet to round it. Check out the sink_5 version I attached above for a demo on what that would look like.

You also might be able to create a sweep along that area for your blended area.

But there are some problems with your current model that will get in the way of finishing it right now - there are a few little zig-zag areas:





Those little zig-zag type folds in the the bottom edge of your basin wall are going to get in the way of making a nice surface built off of it...

- Michael