I haven't fired up a stick yet, nor have i put one to the grinder, but i was wondering if there is a way to tell what a rod is by looks? It has a dark gray almost black flux, and the bare end is painted dark red. the packaging is a plastic bag, green and i'm sure used to be clear, and the only part you can read is safety info about fumes and rays. i will do some testing, but thought i might try the wealth of knowledge here too. thanks in advance.