nautiquelfe, the key is to use the top cover, and you have that completed! Good job.
As for the Ragg Topp protectant, you can coat it right away. Just make sure the new top is completely dry.
Ragg Topp is made by Wolfsteins (
www.wolfsteins.com) and their phone number is 1-800-377-4700. You may want to check with them too, to see what they advise.