A:
Using a sanding disc (one grit finer than previous step) on the buffer over the entire floor can improve blending of edged and drum-sanded areas.
A:
Edger discs are used on a hand-held edger machine to blend the floor perimeter with the rest of the floor. This prevents a “ picture framing” effect when applying stain.
Do not try to make the edger cut more aggressivley by putting extra pressure to the front end. This can lead to ridges and marks which are hard to remove.
For a softer finish when edger sanding, use a maroon non-woven back-up pad in conjunction with your abrasive disc. The extra cushion will give the surface a smoother finish.