Thats what I use for some it may be different.
180-220 before priming, 2k is usually referred to high build primer, sorry about that. 800-2000 wouldn't provide nearly enough tooth for the primer. So in a nutshell, scuff your car with 180-220 enough to reach the base coat or prime but avoid going down to bare metal as then you would need to epoxy or etch prime it because most 2k(high build primers) aren't recommended for bare metal. Spray your primer and block with 400-600, the later for metallics as metallics will show sand marks easier, and repeat if necessary. As said above use a guide coat and sand it to show any low-high areas. 1500-2000 your final coat, hit it with the high speed buffer(wool pad) using a quality medium cut compound such as 3M's Finesse-it II, high speed it again with a glaze and foam pad, wax it and your done. Check out some websites such as autobody101.com and autobodystore.com as they are very helpful with members who are willing to share their knowledge. Cya
