Hi,
I have tried printing my own decals in the past without much luck,
the ink on the vinyl is too transparent and looks patchy,
you can only print it on coated vinyl which I obtained from techsoft, they have a website,there is a danger that it can rub off when getting wet if it’s not protected, I have been told that you can get inkjet printable silk to make flags, this has a paper backing that you peel off when printed also cotton, I am still working on a supplier.
Barry