I've learned to just download thousands of pictures from the net of things I like, then short list the ones that jump at me the most into another folder, then from there you'll end up using what you like like the most and that's usually what you'll be happy with the longest. Take your time with the design phase.
True OG, I'm not very creative so I do this for inspiration or improve on one of my own ideas not necessarily to copy some one elses, but if their ideas are better than mine then so be it.That's a very good method, if you want to use someone elses ideas However, I used this method when researching tyres
If you are interested in unusual paint ideas, have a look at this:
http://www.alsacorp.com/FILES/Alsa2008PaintCatalog.pdf