Frame It, Baby! When diluting acrylic with water, there should be no more than 30% water to 70% acrylic. Or even better, shift to paint of better quality. If you have thick or dry paint, you are in luck! If the background is still wet, just paint over it. Yet, if you catch your acrylic mistake quickly enough, the fixes here may still work. Fixing mistakes with acrylic paint … Pick a dark color to start with and brush using horizontal strokes. Water: Water is your best friend when dealing with acrylic paints. The amount of these holes depends on the weave of the canvas. In most cases, you can easily reuse the acrylic paint if it has undergone consistency changes, such as lumping or drying up. It can be fixed. If Your Paint Is Still Wet. Acrylic paints are water soluble and can be easily thinned out with warm water or flow improver/flow aid. Don’t for… This dries very fast and is painted directly onto the stretched canvas. UV Archival Varnish also allows you to display your artwork without using glass. When using cheap acrylic paint let the layers dry before applying the next one. Oils do not dry as fast as acrylics, so these techniques may work best with those paints. Now, I occasionally have a painting with an area on the side that I can’t touch up without a re-pour, or one where I’m not quite sure if I want to keep, repaint, or toss it. Go crazy! Moisture can easily damage unprotected artwork even if it is framed behind glass. Before diving into the situations where you can fix the dry paint, let’s talk about the only one where you should throw it away. In most cases it’s lazy. But what if the background is dry and you don't want to … Thick or Dry Paint. This is a technique that is widely taught in many acrylic painting books. This is more of a good thing than a bad thing. Solutions. If you're ever painting and mess up, don't worry. Whether you had one too many sips of wine and accidentally sprayed paint across the canvas, or you're a perfectionist whose painting isn't turning out quite like you envisioned, most errors can be erased. You can even use the back of an old painting to practice on; hey, it’s still a canvas. However, acrylic paint loses its ability to bond when diluted with an excess of water. Scrape off as much paint as possible with a painting knife, thick piece of paper, or even an old credit card. Depending on the surface and absorbency of canvas in some cases, diluted acrylic will not cure. What You’ll You Need: Wet Dry Sand Paper (220 grit) I recommend this one from Amazon because of the amount you get and it’s a great quality one to use on acrylic paintings. If the lumps are in the container, then you can add a little paint thinner to restore the paint. Here’s how to fix acrylic painting mistakes on canvas. How to Fix a Lumpy Acrylic Painting . 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