I've never bothered sanding a rim so can't help there.
WRT the old tubs - pull off any lumps of old glue, use a latex adhesive to stick the basetape down if it's pulled away anywhere, then give it a thin coat of glue and leave to dry.
Once it's dry glue the rim, stretch the tyre over it, inflate to ~30 psi or so and even it out. Give it a good roll along the floor to push the tub into the rim.
Do not - I repeat, do not - then pump the tyre up to 160 psi as I used to do, this causes the tyre to try to rotate on the rim and will pull the entire tyre out of alignment. Wait 24 hours for the bond to form, then pump up to operating pressure
Thank you. The base tape had been torn in one area and a small triangle of cloth was folded over. I'm pretty sure it was stuck down like that, so I'll try and repair that with Copydex
I've never bothered sanding a rim so can't help there.
WRT the old tubs - pull off any lumps of old glue, use a latex adhesive to stick the basetape down if it's pulled away anywhere, then give it a thin coat of glue and leave to dry.
Once it's dry glue the rim, stretch the tyre over it, inflate to ~30 psi or so and even it out. Give it a good roll along the floor to push the tub into the rim.
Do not - I repeat, do not - then pump the tyre up to 160 psi as I used to do, this causes the tyre to try to rotate on the rim and will pull the entire tyre out of alignment. Wait 24 hours for the bond to form, then pump up to operating pressure