Is it okay to use rubbing alcohol on your body for acne if you use lotion after?

No, that's not healthy for your skin. Rubbing alcohol is harsh, and will over-dry and irritate your skin, causing more breakouts. Do not over-dry your skin if you want to prevent pimples.

It does depend on your skin type, but if your pimples aren't terrible, use a gentle cleanser like cetaphil for oily skin, and afterwards applying a light, non-comedogenic (doesn't block pores), oil-free moisturiser. Exfoliate regularly, perhaps with a lofah, depending on how bad your pimples are. If you over-dry your skin (by say, rubbing alcohol all over it), you will strip it of its natural moisture. Your skin will then try and adapt by producing more oil. If you have to rub something on your skin, use a small amount of tea-tree oil.

If you have bad acne over you body, then you should see a dermatologist, as they have more powerful acne treatments like oral medication.