Many sizes once again. Borrow one that is fairly stiff, yet pliable. Used primarily as a sweeper and smoother, it can also serve as a trimming guide, but care should be taken when using it this way. If the working edge gets nicked or scored, it will damage your wallcovering later when used as a smoother.
If you choose to use it as a trimming guide, minimize nicks and damage by drawing the smoother along with the knife as you make the cut. The leading edge keeps the paper up nice and tight to the corner.
Because of its fat n' chunky edge, it lacks precision for delicate cuts, but can be used successfully for rough cuts near the ceiling, where high precision is not a factor.
For accurate trimming in highly-visible areas, a putty knife is better suited as a guide. More on this later.
Eventually your handy-dandy smoother will develop a warp. This is planned obsolescence - a built-in defect to get you to buy more. You don't need another one.
Let the warp be with you.
Sweep with concave side toward you - the turned-up corners won't dig in to mar your fabulous vinyl. As a cutting guide, flip it over and use the convex side to your advantage - the downturned corners keep the paper
pushed tight to the cutline.
