why yes it Actually is
Etching of the old concrete with muriatic acid is sometimes done to slightly roughen the surface. There are also commercially available bonding agents available at concrete suppliers and at some home centers.
To roughen a surface, you can use sandpaper, a wire brush, or a sandblaster to create texture and remove any smoothness. By rubbing or sanding the surface with these tools, you can achieve a roughened effect which can help with paint adhesion or provide a different aesthetic look.
To roughen a smooth surface, shape a surface, or remove surface contaminants. i.e. to remove paint from a vehicle.
Lol it is not that "blasting" !!! It is the method of cleaning surface properties by stream of abrasives under high velocity. for eg. smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants
Plastering is done to create a smooth and even surface on walls and ceilings, providing a suitable base for painting or wallpapering. It also helps to cover imperfections in the underlying surface and improves the aesthetic appearance of the structure. Additionally, plastering can enhance the durability and insulation of the walls.
One way to smooth walls without plastering is by using a technique called skim coating. Skim coating involves applying a thin layer of joint compound or drywall mud over the existing wall surface to create a smooth finish. This method can help to fill in imperfections and create a more even surface without the need for traditional plastering techniques.
Concrete
To "score" something means to roughen up the surface. Typically, this is done to increase the adhesive quality or to prepare a surface bond with another.
Fair faced concrete is one which after removal of form work is not required to have any further finishes on it like plastering, etc. Since concrete surface is intended to remain visible all relevant specifications of the concrete surface need to be given in the Tender. Broadly speaking these specification besides giving compressive strength, etc. of the concrete should also be dealing with desired appearance of the concrete. As in all works, they should also specify tolerance limits of defects or blemishes for fair faced concrete. Generally blemishes associated with Fair faced concrete are Blowholes, Steps, Fins, Colour variation, etc. For details and better understanding you may refer to 'Guide to Off form concrete finishes' published by Cement Concrete and Aggregates Australia' Though in India we do not follow it I found it interesting and quite in detail.
vow dung plastering is plastering means making the cow dung is made hard like a plaster
Online courses on plastering are offered by Mastering Plastering. If you are located in the UK, classes are available through CS Plastering School, Able Skills, and Access Training UK.