[MaryBeth9]

I am replacing square corners with bullnose and have the old corners pulled off. I think I need to scrape off more of the old coating to attach the paper to drywall, my husband says attach it to the existing wall. Which is the best way?

 

[oh'mike]

When drywall is installed for radiused corner bead--the drywall is set back from the corner 1/2" to allow the radiused bead to clear the drywall---so you will need to cut the drywall back so the corner is open---1/2" back from the face of the adjoining sheet(even with the face of the stud)

This could be done with a knife---or a Multi tool---