What is a good way to paint over paint on wood?
So I'm following that lovely bit of advice about how to learn shading/lighting by painting wood blocks white and then pose them and draw. (Can't remember who shared that on this forum but I read it here a few times.)
Anyways, I've found a good block set that seems to work since the blocks are small, there are a good variety of shapes and it's relatively cheap. I never knew how expensive good quality kindergarten blocks were until I started looking.
The problem is that the blocks are all painted, rather than natural unprimed wood. I will have to paint over them with white but I'm not sure if I need to strip off the colored paint off of the blocks first with sandpaper or something? Or should I just use spray paint and it will stick? I thought of using Tempera paint but I don't know if it will stick over the already painted/finished wood. Same with acrylic. And I'm pretty sure that house paint or wall paint isn't the right type to use either.
Most of the information I'm getting from google refers to housing or furniture. Not smooth wood blocks.
Thanks for any help.