Gus, this is an easy one and you are going to think I am crazy, but it works even on PSA (pressure sensitive adhesive) decals. I do it all the time this way. Mix up a spray bottle of water with a few drops of liquids soap (type does not mater, dish or laundry). Now spray the panel area down with the mixture. Wet down the panel real well, remove paper backing from adhesive and spray the adhesive down with the solution and then position the decal on top of the panel, water, and soap. DO NOT press it down, just lay it down in the position you want it. I then wet down the top side of the decal for easier sqeegeeing. As it is laying there it can be adjusted to any position by sliding it. Once you have it where you want it, start pressing down on it with your fingers and hands working the water and soap out from under it. Be sure to start in the middle and work your way to the edges. Once you start appling pressure the decal can not be repositioned (it is stuck). To finish it off take a rubber squeege and work the rest of the water and air out from under it. Give it a day to dry completely and you are good to go. :good2:
Here is additional info.
http://www.customvinylgraphics.com/apply-vinyl-graphics
http://www.ehow.com/how_4778430_apply-vinyl-decals.html
BE ABSOLUTELY SURE you clean the painted surface real well. I like to use denatured alcohol 2-3 times with lint free rags.
