You want reflective
The SOLAS tape is good for life vests and objects that do not need to be flexiable. It does not move very well and tends to be stiff. The spray paint is a waste of cash IMHO. For a material to mantain reflectivity, it must contain and retain a retroreflective element like a glass bead. I've seen the spray stuff and the beads are to small to be much good. Sorry to break the myth about the reflective plate holders and such foiling radar. They simply don't have the surface area to be effective and the equipment the LEO's use can be reflected off most any surface. My suggestion for an effective, workable reflective material, the tape used on traffic control vests is the best. It is washable and very reflective. Look up the nearest traffic control supply store and they usually have the vest tape in 2" wide roll goods. The vest tape is also about 3 times brighter than SOLAS.
Your LT reflective guru
2005 K1200 LT "Graphite Graydude Metallic"
Todd "Graydude" Ask me why I'm the best Realtor you've ever met!