The bulk update request #9494 is pending approval.

create alias black_nail_polish (148) -> black_nails (8878)
create alias blue_nail_polish (115) -> blue_nails (2718)
create alias brown_nail_polish (0) -> brown_nails (541)
create alias green_nail_polish (41) -> green_nails (1601)
create alias grey_nail_polish (0) -> grey_nails (440)
create alias gray_nail_polish (0) -> grey_nails (440)
create alias orange_nail_polish (0) -> orange_nails (349)
create alias pink_nail_polish (114) -> pink_nails (3067)
remove alias lilac_nail_polish (0) -> purple_nail_polish (90)
create alias red_nail_polish (139) -> red_nails (3160)
create alias tan_nail_polish (0) -> tan_nails (144)
create alias teal_nail_polish (0) -> teal_nails (61)
create alias white_nail_polish (7) -> white_nails (1065)
create alias yellow_nail_polish (9) -> yellow_nails (652)

Followup:

alias purple_nail_polish -> purple_nails
alias lilac_nail_polish -> purple_nails

The base nail polish tag has already been aliased to colored nails, so it figures these should be aliased away as well. Only some of them have been used but I figured I'd futureproof the rest while I was at it.

_{who the hell added that lilac alias}

Would it count if the nail polish were still in its bottle instead of on someone's nails or claws? How about if it's being actively painted on something other than nails or claws? It might be that we ought to unalias nail_polish from colored_nails.

pleaseletmein said:
_{who the hell added that lilac alias}

I think that was Parasprite.

The vast majority of these are just (color)_nails with no telling what's natural or nail polish from a TWYS perspective, so these aliases make sense to me.

For lack of any better names, I think something along the lines of nail_polish_bottle or nail_polish_(object) would be better for when it's still in its bottle, and then applying_nail_polish (like applying_makeup) for actively being applied.

EDIT: Though, I suppose there's a difference between nails and claws? blue_nails / blue_claws.

There's supposed to be a difference, but sometimes it's unclear or the artist was purposely trying to blur the line. And also sometimes people call blunt animal claws "nails" (particularly canids') so that might creep into the tags sometimes.

"Don't assume that abnormally-colored nails/claws are painted" is a good policy. In a world of sparkledogs, it's generally easier to assume all aspects of a character design are natural coloration unless shown otherwise. I already feel weird using the "eyeshadow" tag given how many characters in mainstream cartoons and games alone seem to just naturally have off-colored eyelids.