Well it turns out that to make it accurate it had to be small enough that physics wouldn't matter anyway, so I just deleted them.
But yes I will do that next time. It's not the first time it's happened and I was always confused.
I also plan on using your paint splatters in an upcoming video (the two from pack 3 and the spilled paint from pack1). They were just the thing I was looking for to go with the stage. Shall I link you when it's up?