if you have white and or metallic inks you need to shake them everyday (or as much as you can remember. ours are shaken at least 3 times a week but usually more) the white and metallic inks settle so if you don't use them for a while you can have issues. the other problem is roland eco-sol white isn't as opaque as you would need to do a 2 way decal. if your machine prints white and metallic i would try this set up. 1-print cmyk backwards on clear, 2-print flood white, 3-print flood metallic, 4 print white, 5-print cmyk readable for the inside veiwing. this is how we silk screen our 2 way decals and it works great. i don't know what results wyou will get with the rolands but another point is to make sure you wait a few minutes in between printing white and metallic on each other because they take longer to dry then the cmyk. they way i have done 2 way decals in the past if they need to be cmyk is print bacwards on the clear then print a separate sheet on white vinyl and mount the two together that works pretty good