Materials
I just got a used sp-540 couple of weeks ago(first printer). I first got any free samples the suppliers would send me to try out on the printer. then I bought some others based solely on price, so I would have media around to turn some quick jobs if needed. I have no complaints with anything i've used. Mostly LG which is much less the avery & oracal, etc... I have been making vinyl banners and signs for many years and never had anyone question whether the material was gloss or not. I needed a 39" roll to make 3' banners they had gloss in stock not matte so thats what I bought. I doubt anyone will complain.