Stick sandpaper to cutoff pieces of PVC pipe with spray adhesive. 1/2-in. i.d. = 7/8-in. o.d. 3/4-in. i.d. = 1-in. o.d. 1-in. i.d. = 1-1/4-in. o.d. 1-1/4-in. i.d. = 1-5/8-in. o.d. 1-1/2-in. i.d. = 1-7/8-in. o.d. Spray paper & pipe with a generous layer of adhesive. Let dry several minutes before joining them. Use two grits on each pipe—80for sculpting a precise radius, and 100-120-for finish sanding. When the sandpaper's worn out, pull it off, spray fresh adhesive on a new strip & go
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