What is Reddit's opinion of 8 Piece 13 Profile Flexible Contour Sanding Grip Set with 3 Different Flexible Foam Pads and 5 Profile Grips for Convex and Concave Sanding Perfect for Woodworkers, Automotive, Home, Arts and Crafts?
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My hands wouldn't have been able to do it without using a set of sanding grips that each have a different radius to them. They allowed me to follow the original radius of the blade and not change its shape.

These are similar to what I used

I would try something like this.

8 Piece 13 Profile Flexible Contour Sanding Grip Set with 3 Different Flexible Foam Pads and 5 Profile Grips for Convex and Concave Sanding Perfect for Woodworkers, Automotive, Home, Arts and Crafts https://www.amazon.com/dp/B0041IPAVQ/ref=cm_sw_r_cp_api_glt_fabc_3CHMPYH761WK0Z1AQCJP