There are two basic methods of vinyl application, "wet" and "dry". The most common method for DIY use & larger graphics is the "wet" technique.
The most important step to ensure a great finish for your graphics is to thoroughly prepare the area first, clean and degrease all sufaces where the vinyls are to be applied. Remember vinyls will not stick to a waxed car!
Correct positioning is important. The graphic should be positioned prior to removing backing paper to ensure correct alignment of graphic to your vehicle. Use a piece of masking tape along the top of the graphic, half on the transfer film and half on the panel. The tape will act as a hinge on the top edge of the graphic.
Lift the graphic on its hinge and pull back the backing paper. Spray the back of the graphic with water using a hand spray bottle. (The surface can also be sprayed).
Slowly lower the transfer tape and allow the graphic to return to its original position. Using a squeegee, start from the top centre, using horizontal strokes to the edge of the graphic. Continue with firm strokes from the centre to the edge, down to the bottom of the graphic, enduring all air is expelled from behind the vinyl to achieve a good adhesive bond.
Allow ten minutes for the adhesive to cure, in colder conditions more time will be needed, test on a corner first. Spray the transfer paper with water or application fluid and allow it to penetrate, this should take a few minutes depending on the weather conditions and humidity. Spray the paper once more and allow another minute before removing the transfer paper. To remove the transfer paper, start at one corner and pull back slowly. Once the paper is removed, check for correct adhesion, air bubbles and creases. The graphic can be rubbed down again with a felt squeegee or place the silicon release paper over the decal and use the plastic squeegee. Note: NEVER use the plastic squeegee directly onto the vinyl, it will scratch the vinyl.
The dry method is the prefered method for professionals & requires a fair amount of skill and experience. It is recommended that dry application be used when very thin vinyl (such as mirrored / chrome) or small graphics are to be applied. This method is exactly as above but without the use of water for bonding. Again, preparation is essential.
Pricking the bubble with a pin and then using the squeegee to push the air towards the pinhole can remove small air bubbles (use a felt squeegee or finger pressure).