i will add to this shelac silliness...
ive done it on red tape, came out looking a nice deep maroon. its obviously not cushy, but some like a harder bar. stays in place well, but still removable. pretty good grip. water proof-ish. durable. i like it on cloth tape but not so fond of it on natural cork.
maybe you got a bad can, or its just a thick brand....they stuff i bought from home depot was real thin. kind of soaked into the cloth. just two coats for me, and no melting or anything like that.
me gusta.