If the scraping noise is more of a "rumbly-grind" and only happens when you turn one way, suspect bearings.

The typical symptoms are a gradually louder and louder grindy-whine or moan at increasing speed and a great increase in the noise as you turn one way with a similar diminishing of the noise when you turn the other way. It may be accompanied by increased noise when braking, but sometimes (oddly by my way of thinking) it will diminish when you apply brake... Once with a rear bearing it diminished under light braking (but the pedal pulsed) and got bery noisy under hard braking.

The fronts are a rather lengthy but simple process to remove, clean, check, replace or repack and adjust. The brake caliper must come off (and hang up out of the way) but otherwise only the hub comes apart.

The rears are a bit more af a hassle as you have to get the stinker of a drum off and that will require the proper hub puller.

Oh, when my rear hubs were only on "finger tight" the rear end made a horrible scraping racket as the speed increased (being towed, fortunately).

--
Mike!