I have used a number of sprays to coat my acrylic paintings. For several years I've used Krylon Crystal Clear and have a friend who's been using it for a decade. I buy it at Kmart for $2.95 a can. The Golden varnish was purchased at an art store. It cost $17.99. I wouldn't use Krylon just to save money at the expense of good results but in my opinion it does as good or better job than the expensive stuff.