I keep white, gloss black, red and silver in stock. White and silver have been the most used. I'm still on a free roll of gloss black.
Other stuff I keep around are exacto blades, I go through these pretty fast. Masking tape comes in handy when I have a decal that I can't pin down for one reason or another.
As for app tape, I started off with a 12" roll. Most of my decals are in the 6" range and I have wasted a lot of app tape. I would suggest something smaller if you are going to do small decals like I do. I very rarely have anything that uses 12" tape effectively.
Other stuff I keep around are exacto blades, I go through these pretty fast. Masking tape comes in handy when I have a decal that I can't pin down for one reason or another.
As for app tape, I started off with a 12" roll. Most of my decals are in the 6" range and I have wasted a lot of app tape. I would suggest something smaller if you are going to do small decals like I do. I very rarely have anything that uses 12" tape effectively.