Create or collect images for your model, jpg's etc or download from google images.
Print on to self adhesive vinyl available from 'Print4biz' on e-bay. Clear is best if you can get it although white is good.
Print images using an inkjet printer, allow a couple of days for ink to dry, before applying to model.
Best to fuel proof as it stops ink from fading or being attacked by fuel. HiGrade or 2 part Aerokote work fine.
Use your imagination and customise your plane, remember 'sky's the limit'

Thanks Steve I will have a look.