Leather can be all sorts of different shades of brown and orange, not to mention black. I have to sometimes paint three or four different shades on a cowboy era figure because it would look goofy if it was all the same color leather.
Here are the best ways to paint brown leathers using Acrylic paint.
1: Try to find a brown that is a close to your final desired color. That will be the base color. We will need two more colors that we will add so we have a highlight and a shade.
For shading I use a very dark brown (as close to black as possible), and for highlights I use yellow (never use white).
You will need four small containers to hold the paint. (Soda bottle caps are cheap and can be thrown out after use.)
2: Painting the base coat.
Take the base color and place about 10 drops of paint from the jar into the first container (dipping the back of the brush into the jar works well to control the drop size). Now add a 50/50% ratio of water to it. It is very thin and will have the consistency of milk after stirring. Now start painting your first coat. It will not look like it does anything but it does (trust me).
If it looks like the there is too much paint on your brush when you first dip it in. Take a piece of scrap paper and unload it a little with one stroke. Don't worry there is still paint in the brush (trust me).
3:****let it dry.**** a hair dryer will speed things up.
4: Repeat the process until you have even coverage.
This method takes a little longer than one thick coat. However, you will lose any details, such as texture or folds.
5: Highlight color.
Take another bottle cap and add 10 drops of your base color, and three drops of your highlight color. Now add eight drops of water. We want this to be a little more transparent than the base. *** THIS IS NOT A WASH*****
When you dip your brush in it will load up with too much paint. That is okay you just unload it with a couple of strokes on a piece of paper. Now we paint the highlights. These will be the areas that would be in sunlight the most. For example, the top of the object, and the tops of all folds, wrinkles, edges, and seams.
Paint these areas with one coat. Again it will look like nothing is happening on the first coat.
*****Let it dry completely. ******
6. Apply a second coat but to only the inside half of your first highlighted areas.
*****Let it dry completely. ******
7. We apply a third coat to half of the inside areas of the second coat of highlight color. It is kind of like we are building an island of the highlight color. This method allows the highlight color to slowly blend in this the base color.
8. **Optional *** The very top highlight will now be the yellow or orange color in the center of the highlight. Very small and light you do not have to thin it out. It will make the highlights pop.
9. Shadow color
Take ten drops of the base color and add 3 drops of your dark brown to your third empty container. Add six drops of water. *** THIS IS NOT A WASH*****
We will now paint the areas that do not see as much sunlight. This will be folds, wrinkles, undersides, and the center of the stitching areas.
We do the same thing we did with the highlights by make islands of the darker color. with one exception.
The shadow areas should not be so big that the first coat touches the first coat you put down as a highlight. There should always be a band of the base coat color separating the highlights and the shadows. I make it a rule that all vertical areas will always be the base color.
*****Let it dry completely between each coat. ******
10. UNIFICATION.
If everything you have done, has been successful up to this point. Your leather will look a little like stripes of colors from light to dark. We want to have all of these colors blend into one another. This is where the base color will come in.
Take the fourth container and pour half of you base color into it. Now add eight drops of water to this. The consistency will be very translucent.*THIS IS A WASH SORT OF BUT NOT* I call it a glaze/veil.
Dip you brush into this container and unload it on a scrap piece of paper. Now unload it again. We want the brush wet but not too dry.
Now paint over the whole object highlights, base color, shadows areas in one thin layer.
***** let it dry********
How does it look? if you are not satisfied apply a second glaze coat.
Did the second glaze dull down the highlight? If so then apply the highlight coat again but only in the very center of the highlighted area ( the brush should be unloaded to the point that it is barely wet).
Same goes for the shadow areas.
This is the basics of leather. I can post another more on how to make it look worn and distressed as well as painting textures effects.
I have won many figure painting competitions with this technique.
If you are using a different medium, oil paint or enamel. I can post techniques for these as well.
Cheers
Todd