Joe Bobst wrote:

has anybody had experience with this type of product?

Used the repair kit from MinWax, works pretty well. There is also a step by
step article in a "This Old House" magazine a while back.
Commercial body fillers (bondo type) work very well if the substrate is decent.
....

The Minwax kit is Bondo at roughly 3x the price...

I checked the MDS some time ago as part of a discussion on the FWW
board...they share the same one.