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Contrary to popular belief, fabric and furniture protectant sprays that are made for suede or leather aren't always safe to use on velvet. Look for shoe or upholstery protectant sprays online or in general department stores. As you shop around, read the label to make sure that it's suitable for velvet. Look for a product that repels stains, waterproofs materials, or does both. Try products like Scotchgard or Vectra Furniture, Carpet and Fabric Protector Spray. Even if you find a product that you think won't damage your velvet shoes, it's best to try it out on a small, inconspicuous part of a shoe before spraying the whole thing. Spray just a little protectant onto the back of one of your shoes. Then, observe it to make sure that the spray doesn't have a negative effect on your shoes, such as darkening the color or hardening the material. If you spray the protectant too close to the velvet, you may cause damage to your shoes. Hold it at least 6 inches (15cm) away and then lightly mist the entire surface of each shoe. This may help to significantly minimize day-to-day staining and damage due to weather. Reapply the spray every 4-8 wears to get the best results. Set your misted shoes outside underneath a covering, such as a carport, for best results. This way, your shoes can dry thoroughly in the fresh air while being protected from the elements. Touch the velvet to make sure it's totally dry before putting them on and wearing them out and about.
Select a product that's safe for velvet. Spot test a small area first. Hold the spray 6 inches (15cm) away from the shoes and spray them. Let the shoes air dry before you wear them.