Water Slide
I did my last panel with water slide and will do the same to the -8.
You cannot print white slide decals as far as I know. Perhaps someone makes a white inkjet that I'm not aware of.
I made a design in Visio and saved it as a PDF (moving between computers mac/windows). I purchased inkjet water slide paper at a local hobby store for something around $12 for 3 sheets.
Be aware inkjet and laser printer water slide paper is different, use the correct one.
I also used the special spray they sell with it. I would avoid this as it caused some minor problems with the panel.
I my panel with rattle cans and other than some minor imperfections around the labels due to the use of the special spray it looks great.
Primered/sanded/primered/sanded to 400 grit until the panel was smooth. Then painted with color a few coats with sanding 600 then 800 grit. Then a coat or two of crystal clear followed by a light sand at 800 grit.
Applied my decals, then did a few coats of crystal clear and a light sand at 800 to 1,200 grit. Followed by a couple of coats of satin clear.
I first tried to use Stein at $40/sheet by sending PDF. For some reason the decals back from Stein where a tiny bit smaller, I don't know why or where the problem was, probably mine. In the end it was just easier to do it myself.