It shouldn't with a normal accoustic guitar, unless there is like a 0.5cm thick layer of it. A violin, probably, the sound resonance would be affected.

Atually, the first one was pre-owned and donated to me, the violin was the cheapest one on Ebay and the third guitar was an old damaged one from the attic. I also have another old, damaged violin, and a donated guitar and violin to be decorated. Not to mention I'm picking up a free guitar from Freecycle this week. :) It's just a case of charity shops, getting lucky, buying the cheapest available (if not for playing purposes) or doing commissions. I have my own personal violin that costs a lot and is an antique, so that one isn't being done up at all. So if you know where to look, you can do this for not too much, the tester pots of paint are only £1 each.

Obviously there's going to be a minuscule sound difference, but it IS playable. Whether it's to your standard of quality or not is another question. https://www.facebook.com/tara.hegarty.7/videos/vb.100005448335775/540218106169796/?type=3&theater Here's a video of the whale guitar being played, FYI it's got s**t strings and it's old, hence why that one is for my keeping lol. The violin is simply a visual art piece.