After I used the procaulk tools for their intended task I threw them on my art desk intending to put them in the garage. They now have a permanent place on my art desk. When I use them to smooth out collage pieces glued down with anything- wet glue, glue stick, etc... They don’t mar the surface or change the texture of the piece. My bone folder will often leave a collage element shiny looking. Procaulk tools don’t.
Glue, modpodge, gel medium and glue stick peel off the tools after the glue has dried. That makes clean up super easy.
They are also awesome for scraping paint across a page or off a page. I’ve never applied a thinner amount of paint than I have with these. I can also scrape through paint to bare paper.
These weird blue as-seen-on-TV doodads are awesome. I picked mine up at home depot for about $7.