THE BEST SURFACE FOR ADHESION OF TRANSFERS IS A GLOSS SURFACE. When the transfers have cured, you should over-varnish them for protection with a clear varnish of your choice - matt, satin (eggshell) or gloss.
DO NOT TOUCH THE SURFACE OF THE MODEL WHERE YOU INTEND TO APPLY TRANSFERS. EVEN YOUR FINGERS CAN LEAVE GREASY DEPOSITS WHICH WILL IMPEDE SUCCESSFUL APPLICATION. Ensure the surface is dust and grease-free.
DO NOT RUSH APPLICATION OF TRANSFERS. If you have spent weeks or months building your model - or even just re-painting it - it is unreasonable to expect to apply the transfers in a couple of hours. Your patience will be rewarded with a model you’ll be proud to exhibit.