if u dont sand it, mite as well not even do it. dont have to be meticulous with it for a decent job like ceo was saying, but i garantee itll look like shit if u just load it up with primer the way it sits now, and then load more yellow on top of it.
if you wana take the time to do it right, ill explain in detail what ceo was talkin about, and what steps u can skip-if ur already kinda set on a 40mph/40ft paint job, i wont bother