Painted German Army Trainers
Obviously this is pretty easy, and not very hard to figure out, but this is how I did it. I just had some year old beat to shit sneakers that I wanted to give new life since I am going to get a new pair of the originals anyways.
Washing the shoes. This removes all of the oils, dirt, shit or whatever that is on the leather and will keep the paint from adhering properly.
Drying the shoes. This can be done outside with a hair dryer or inside a clothes dryer if you have a special attachment.
Once they are dry it is a good time to fix any detached parts of the sole with some shoe goo.
Painting prep. Once the glue is dry go ahead and use some sandpaper all over the shoes. Don't worry about ruining the leather; you probably won't and you are going to paint them anyway.
Mix your paints. I would not recommend using anything but acrylic to paint. I mixed maybe an 1/8 cup of water with a generous amount of paint and a little squirt of white. If I were to do this again I would add a little more water.
Painting. Pretty self explanatory, just go crazy and experiment. I used a gesso brush for this part, but you could use one of those cheap foam brushes as well. I would not recommend using anything smaller and a 3/4" brush. If you want to do a second coat, always let the first one dry completely. Make sure you get out any globs of paint while the paint is still wet
That's pretty much it!