Prior to application, carefully cut out each decal closely to the printing. On complicated shapes, try to cut smooth curves which closely follow the contour of the decal using sharp scissors. For smaller decals, use a sharp craft knife and cut using clean straight lines.
Once your decal is cut to shape, place it in a saucer of cold water and leave to soak for 30-60 seconds, until the decal has released from the backing paper. Do not try to slide the decal from the backing paper until it has fully released as this may stretch the varnish or cause it to break.
Slide the transfer off the backing paper directly onto the surface you are fixing it to. For larger transfers it can easier to slide the edge of the decal off the sheet first and then, whilst holding it in position, pull the backing paper away from underneath it. Whilst the decal is still wet manoeuvre it into its final resting position, ensuring that you have worked any air bubbles out to the edges. Wipe away any excess water with a piece if kitchen towel or tissue paper and leave to dry for several hours in a warm place.
To smooth off the edges of the varnish and to ensure that the decal sits down snuggly over uneven surfaces and protruding details, such as rivets etc, you may wish to use a decal fixing solution such as Microsol. There a few fixing solutions available online, but I mix my own from a mixture of water and cellulose screen printing ink thinners, which works very well. Care needs to be taken that the solution you use doesn’t affect your painted surface and it is always advisable to perform a test before use. If used correctly, a good fixing solution will make the edges of the varnish smooth to the touch and practically invisible. If you apply the fixing solution to the printed surface of your decal, do not use too many brush strokes as the softened inks may run. a single brush should be adequate, and don’t be alarmed if the decal wrinkles up as these wrinkles will reduce, and pull the decal down firmly to the surface when fully dried. You may also brush the fixing solution onto your painted surface prior to applying your decal over the top of it, but I always give it a final rushing of solution over the top of the printed surface also.
Transfers should only be applied to grease free, clean, glossy surfaces. If you require a matt finish to your model, over-spray it with a suitable matt varnish after the transfer has been fitted and has dried thoroughly. As with all transfers, it is strongly recommended that you coat them with a clear varnish after application to seal them in position and protect them indefinitely.