THx for the response,
Resetting or simply removing the skin would have been what I was after.
To clarify the point that was confusing: The unbreakable tools have a unique icon that you see when they are in your inventory or equipped slot. It has a yellow border. I was wrong about the yellow border, that was my imagination, but it does have a yellow title. Once you apply a skin to them, that icon no longer appears that way, and the individual tool now gains the icon of whatever skin you applied. So since i bought the harvest dragon skin and applied it to my harvester tool, my only two options are to keep the dragon skin on it, with that dragon icon as that tools identifying icon, or change it to a "basic" harvester tool skin and icon since those are the only two skins I have. The wrap up of this, is that now i have no idea which of my harvester tools in my bags is my unbreakable one unless i look for the text in the tooltip that says Transmuted - Unbreakable Harvest Sickle. - It's just an annoyance. Either i keep it as the dragon, or a basic. - it will no longer be able to appear as its default "unbreakable" icon.
They need to add a function to just "remove" cosmetic appearances you have applied and restore the items default.
In any case, thanks for the reply!