I had some luck by wetting it, not sopping wet ,and lay it on flat surface belly side up
and put some weight on it for some time...I usually leave it over night depending on size.
Doesn't always work,but other times is the right cure
Looks real nice Steve....what I do with my xmas bells is paint them and then spray them
with glitter spray I get in craft section at wal mart.not as pricey as glitter paint.