I have just bought an oil painting from Goodwill that has some "soft" spots, areas where the canvas was stretched by pressing against something. It's a relatively new painting and the stretching hasn't affected the paint. How do I tighten those spots that have stretched? Is there a professional spray that does that?
I'm also an artist and the advice above is correct. You can mist the back with a water or dampen a paintbrush and lightly "paint" the back with water. It will tighten up as it dries.
My husband was an artist. When he shipped his oil paintings, they got 'dented' in transit. He took a sprayer, and sprayed water on the back of the canvas. Let it dry and it will have shrunk back to normal. It worked for him. He also washed his paintings with Ivory Soap mixed with cold H2O. Use soft makeup brushes. Dip in the soap, and lightly use the same as you would apply makeup. Rinse the same way. Let dry. If they are old oils, take to a pro.
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