Removing stick on sail numbers

[MM5AHO]

I bought a second hand spinnaker with another number on it than mine.
Any ideas on how to remove the number? Its a cloth/vinyl type number stuck on with some type of glue. Its possible (but difficult) to remove the numbers by peeling, but a very sticky residue is left. I don't want to use something that might damage the sailcloth.

 

[KevO]

I peeled and then used spray on sticky stuff remover... Then washed it all thoroughly. It worked fine. No probs since

 

[KevinT1]

Pull off the sail numbers first, useing a hair dryer to gently warm up the glue.

Then use acetone and a credit card to remove the glue. Go easy on the acetone and use gloves and don't breath it.

I've replaced quite a few sail numbers this way

 

[wilkinsonsails]

Acetone not good for spinny nylon,perchloroethylene is best but not easily obtainable,use in well ventilated area.
Release the adhesive by putting solvent on the back of fabric and soak a while .Peel off number and then scrape any residue .Repeat rinse to clean off sticky .