Base Naruto is his normal appearance without any mode activated.He had no Sage Mode markings around his eyes yet they were the same as when he uses BSM.Naruto was in base when he saved Gai.
It's like with Sasuke's Sharinnegan they both can't turn their eyes back to normal because it's connected to Hagoromo's chakra.
Or they simply were using a minimal amount, Naruto and Sasuke have been fighting so natural they aren't going to turn their powers off.
Maybe Naruto has better control and can use his powers at a minimum.
The bandage hand says they still have their powers, as even if a scar was left they wouldn't need to cover it up like that.
Bandages have always been used in Naruto to cover seals to contain their power or keep them from being activated by accident.
Sasuke wears bandages on his arms to cover seals he uses to summon weapons.
And even then seals have never been shown to leave scars on the user.