Can you mix oil paint with acrylics?
There aren't too many reasons why you'd want to make an oil-acrylic blend outside of creating unique effects like glazes (when thin layers dry before others) or simply learning more about how different materials work alongside each other.

In fact, oil paint can actually dilute the color intensity of acrylics and vice versa so it's best to pick a single medium if you want your work to have a consistent appearance all around! However, this is only true for certain types of acrylic paints -- some are specifically formulated to produce different results when combined with oils which make them worth looking into as well.
Which is more flexible, oil or acrylic?
This depends on what you mean by flexibility- in terms of how it works with other mediums -- both are equally as easy to use with watercolors and markers.
Is Acrylic Paint Water-Based?
Acrylic paint is neither water-based nor oil-based -- it's actually a special type of emulsion that uses an acrylic resin as its base instead. This not only makes it more flexible but also allows for stronger pigmentation without adding too much thickness to the mixture!

The most common types you'll find are either standard or high viscosity which means they're somewhere in between runny and thick, although there are other options available if this isn't what you need! For example, fluid acrylics can be used when doing very detailed work with thin lines while heavy-bodied acrylics tend to have a thicker consistency good for large canvases.
How does acrylic paint clean up?
When you're done with your painting and ready to take a break, cleanup is one of the most important parts. The good news is that both oil and acrylics can be cleaned off easily with soap and water or even solvents like turpentine if needed (although these tend to make surfaces highly toxic so use them sparingly!)