I use both Tamiya and Washi tapes. Whenever I want a dependable paint line I use Tamiya. The Washi types of tape can used for color spraying seperation but it may 'bleed'. So be cautious. Washi can be purchased in various widths at a very reasonable price when compared to the Tamiya tapes. Washi tapes make excellent, economical, filler taping.You may want to look on Amazon but be careful, there are so many brands and different pricing between the same item. A selection of widths is handy but the wider tapes can be slit to accomidate if you don't want to invest a lot. I did some rough testing on adhesion, pulling already painted material away from model on a previous post. Do a search on Washi and it should pop up.