Varnish in Oil Painting
The use of varnish can be a very good thing in an oil painting and canvas as it can keep the surface intact and safe from cracking.
The oil painting needs special care from moisture as it is easily absorbed into the wood and fabric.
Too much heat can change the size of the oil painting and may cause the canvas to sag.
Lighting can also have its effect on the oil painting and canvas. You should keep the oil painting where harsh rays of the sunlight may not reach. www.canvaz.com