quick impellor question

I needed to buy a new impellor because mine was completely demolished. It didn’t have any fins left when I took it out of the housing, so my question is… which way do I put the new one in? Which direction does it spin? I didn’t want to have to pay someone to put it in, it looks pretty basic. Also, is there some kind of spray I should hit it with before I put it back together?

Thanks!!!!
kal