Zinc Rot in Dragon Wings Models


Anyone own any Dragon Wings models affected by zinc rot? I have two of about a dozen or so...hoping the others won't be affected. Granted these models are about 20 years old now, they're one of a kind and I hope to have them intact another 20 years from now.
I have a SQ 772 that has it. Of my DW that's the only one I've seen it on.
Yes, I have the same but it is nearly not visible and I have not noticed any changes during the years after I discovered it.

I have a few Gemini Jets, Jet-X and AeroClassics models with zinc rot.