Yes and so do you, followed by an 'incident'

Hermione thinks for a moment before sticking her hands in... Right next to Harry's. Hermione gave him a raised eyebrow as all talking in the potion class stopped, and Slughorn also gave Harry a confused look.

"Harry my boy... um that not a potion mend for men normally."

Harry just gave him a reassuring smile as he felt his fingertips tingle.

"Oh I know sir but I remembered an old Potionairing saying. When making a potion to be used for others, never make a potion you were not willing to test on yourself."

At this you noticed a few other guys looking at there cauldrons then at their hands. A few even followed Harry's lead and dunked their hands into their own potions.

As the tingling stopped, Harry and Hermione removed their hands from the potion and admired the changes.

It looked like they just got done with a spa day. The nails were completely clean and even.

(Harry's looked slightly longer now.)

Their cuticles were now pristine and any signs of cracks or hangnails were completely gone. As he looked at Hermione's he saw her nails rapidly changing colors, as she looked contemplative. Finally stopping at red with a slight gold border along the edges. Without asking about it he started concentrating on his own nails, and just like that they started changeling colors too.

Green? No.

Dark Green? No.

Blue No.

Orange absolutely not.

Red?....no.

Red with gold border? Not me

Pink?........ maybe try it again later.

Black? Ha, no

Clear coat? Good for now.

As Harry stopped on something normal and overall unisex. He stopped looking at his nails while Slughorn was clapping.

"I must say I am very impressed, that saying you said is One that has sadly fallen out of use, but it is one that I've always expounded. 10 points for Gryffindor for reminding me of what all good potionaire should remember."

After potions the great hall was very lively with people talking about potions.

More specifically everybody who use there potions showing off there new nails. Even a few guys even playing around with the fact that they could still change the color of their nails. While a few in Slytherin kept there's ether Green, Silver, flat Black, or some combination of the three.

Both Harry and Hermione felt a little intrigued by the idea they may have started a new fashion trend in Hogwarts.

It was that night on a Friday that Harry got back to the Room of lost things. He was so happy to see what was next with the armoire he didn't see that a new pile has been placed in the room. Now this would normally not be an issue but, this particular pile was a jumbled mess of recently broken/ recently rediscovered things over the week. Including a just rediscovered stone bust of Gildaroy Lockheart, which Harry accidentally kicked, stubbing his toe. Now if that had been all he probably wouldn't have gotten frustrated. But the shift of the bust caused a few items in the fresh pile to move including an old racing broom which fell off the top, and smacked him right in the head.

So while hopping on 1 foot and rubbing his head with one hand, in a small bit of frustration he had grabbed the offending broom and threw it as hard as he could.

So by chance or serendipity the broom sailed across the room and nailed another bust, a wooden one, with a long boa wrapped around its neck, and a weird tiara on his head. The wooden bust did a spin before landing on the ground with a crack, oddly the tiara stayed on. But the bust had a huge crack on its face. As he noticed what he did a quick bout of panic set in.

'Shit! Shit! Shit! That's way too noticeable a thing in this room. And that crack is even more noticeable. Malfoy is still doing something in this room. If he notices the damage on the thing he might realize somebody else has been coming in here.'

Quickly he raced over picking the bust with all the stuff still on it. As he held it he quickly looked around. As he did he noticed a cabinet off to the side. Without thinking about the fact that the bust being missing would be just as jarring as the fact it has a crack on it. He ran over to the cabinet, opened it, and tossed it inside closing the door.

'That's not really fixing the issue but it'll do for now. I'll figure out what to do after my latest session.'

As he walked off to the armoire, he didn't know that was a vanishing cabinet.

A 'faulty' vanishing cabinet, and the tiara on the busts head was a very special diadem. He would never know that the faulty cabinet tried to send its contents to its sister cabinet in Bergen and Berks. He would also never know that the diadem did not take kindly to this mode of transportation. Because upon arriving it was no longer in the greatest of shape. Cracked sparking and hissing a putrid black smoke. And in a great release of magic it exploded. Destroying the diagram, The sister cabinet.

(which sent a backlash that fried the runes on the original cabinet)

And also happened to destroy Bergen in Berks.

There was also an unexpected outcome from this for Harry himself.

Suffering a slight headache for the night as his scar lost its dark magic.

But any pain he felt he just attributed to the smack on the head.

(besides he was soon about to feel enough pleasure that he would barely even notice.)