Is there a good way of restoring the needles back to their original shade of orange?

I've had tachometers in the past that have been a bit 'slow' to react, and kinda hang.....don't really keep the pace with the engine's actual speed. I know it's not normal because I have also had tachometers that are right on pace with engine rpm fluctuation. I was wondering if anyone knew how to fix the tachometer to make it accurate quick again? I've already tried cleaning/inspecting the tachometer signal wire at the coil. It's definitely very clean...I even sanded the eyelet down and clea

Decided this car is too much for my situation at the moment. Doing college and it's a 1 hour drive, I feel this car would be better off in the hands of someone more experienced and knowledgeable about this car. It starts and drives fine, until it warms up. Then once it warms up it rocks slightly when pressing on the gas to keep speed. It doesnt rock when your foot is off the gas and it's in gear, nor does it rock when you accelerate hard. Only when you're pressing on the gas to keep at the same

just curious what it means----never really noticed it before---- gig out