[nate_g_2003]

I work at Grainger Industrial Supply, and those are decent, good for homeowner use.

What you want to look for is how much air the tools you will be using require. 5.8cfm @ 90psi isn't bad, but the paint gun and your impact may be starved a little. The higher the CFM @ 90psi you can get is better. You could paint with that compressor, but make sure you have a good filter reg on it, or the moisture and oil will ruin any painting you did. Your grinder, impact, and ratchet should do okay, will probably kick the compressor on a lot.