Stucco patch and clean - best choice?

What's the best product for patching this kind of stucco? It's styrofoam-like inside below the mesh and in the middle of a big white wall on the building that immediately abuts my city home. Stucco also has some brown marks and a few chips here and there. I need to patch and cleanup if at all possible so I'm wondering which product(s) and whether I'll be able to match color/texture.

Thanks!

 

This is an Exterior Insulation and Finish System (EIFS) Arguably the best known brand in the US is DRYVIT. There is actually an established procedure for repairs like this. I have not looked at their web page or the web page of competing brands to see if there is a video. I don't want to spend the wrist energy to describe the procedure. But I think you can do it another way. You lose just a little insulative value this way. Cut out the loose stuff. Cut out the foam until you think you are down to sound stuff. You might go all the way to the substrate. That is okay. Cut it out slightly behind the mesh and coatings. Paint the foam with a bonding agent like Weld-Crete. Also Quickcrete makes a bonding adhesive. Use an adhesive not a fortifier. They look a lot alike. Mix up some fast setting mortar or mortar repair material. Force all you can behind the mesh and coating and fill the hole full and screed it off. Keep the surrounding face of the existing as clean as possible. Don't let it build up and don't make your mixture proud of the surrounding. Now the finish is an acrylic material with aggregate in it. It is applied and textured with some sort of tool, maybe a hard rubber float. maybe a trowel, maybe a piece of styrofoam. Trick is to get the material I don't know where you can get something like this unless you can find an applicator who will sell you some or give you some.
So probably your best bet to match the texture is to mix up more of the same stuff you plugged the hole with and spread it on tightyly and float it with a green sponge float If you don't get a satisfactory match try something else like a wet paint brush. You want to bring some sand to the surface. Try your best then let it cure, dry and paint. You might also try some acrylic caulk in the little dings. fill it full, brush it even with the surrounding and throw some sand against it. I don't know how to deal with the rust in an amateur friendly way. Maybe try some Kilz and paint it.