I have seen some refinished 3-D targets around. Does anyone know what type paints to use?

Mckennzie has a paint that puts the surface of the target back like new. Ok not new but in pretty good shape. They also make a repair kit to fill the holes.

I've used acrylic from Lowes on mine successfully.

Wally-Worlds Best at Le$$ than a Dollar a Can!! Gots to Watch those Dollar$ Now!! "Want$ and Need$" is  THE Motto for the 21st Century!! Sad....But Very True.      

Any latex house paint works fine.  I usually buy the cheapest I can find in a color that closely matches what I'm looking for.  I'll not spend more for the exact color.  It's just not worth it.  I use a cheap brush so that I can jam paint in the holes and not worry about destroying a good brush.