What grit for removal of prefinished hardwood coating?

[Swimnswim]

I believe prefinished cherry, about 15 yrs old. Nice wood but not the greatest prefinish. The damage appears to be superficial. Was thinking of using Makita 4” belt sander for 360sqft - flexible on that. What grit required to remove the old finish to prep for oil polyurethane?

 

[highup]

You definitely do not want to touch that with a belt sander.
Is it an engineered floor or solid wood? Is the floor stained or natural wood color.

 

[DarisMulkin]

You definitely do not want to touch that with a belt sander.
Is it an engineered floor or solid wood? Is the floor stained or natural wood color.

I agree to aggressive and fast

 

[highup]

Before trying anything, lay a short straightedge across the boards in a lot of areas. With prefinished products, the boards are not on a perfectly flat plane. Any gaps you notice will tell you how much material needs to be removed.
If the edges have a micro bevel, that may disappear here and there and won't look good.
I'd be thinking more like a Scotchbright pad that barely roughens the surface. Then again, your finish would need to be compatible with the factory finish.
Is the material nails down or floating, solid or engineered?

 

[Floorist]

If engineered, you may go through to the plywood.

 

[Dan]

You definitely do not want to touch that with a belt sander.
Is it an engineered floor or solid wood? Is the floor stained or natural wood color.

Maybe he wants a hand scraped look.

Seriously though, a flat sanding job would be impossible with a hand held belt sander.

Swimnswim, you can look at a floor register and tell if you have engineered or a solid wood floor.