I have just been on a subway art spree lately. Got another custom order for one. This time the request was for a family rules sign. Got right to work designing.
I used my Silhouette SD to cut out the vinyl and bought the 12 x 24" plywood board at Joann. There really isn't a different technique to explain on this one. It is the same concept as the others I have done.
To make one, you just paint the background and then tape off the sides with painters tape after it dries. Then, paint the thin line border by applying a second row of painters tape. Next, remove the tape and paint the outer edges. Lastly, you apply the vinyl words using your transfer tape and hope that they end up straight. That part is the nail biter...
There IS one thing that is necessary when you do one of these projects... Patience. Go slow and take your time. That is all. Not hard, just a tad tricky is all.
I will say though, the satisfaction that you get when you are all finished is definitely worth the effort.
Give it a shot! Much better than spending a fortune on one from Etsy!!