I don't know if this has been posted before but I just found it and it has some great ideas. Hope someone else can use it too!
Here is a link that might be useful: Stamping Tips
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Houzz TV Houzz TV: Create Your Own Mural Wall With Easy DIY Stencils and Stamps
Artist Kristin Nicholas shows us how she makes her one-of-a-kind art walls. Watch the 3-minute videoFull Story