Betcha thought I'd tell you, eh?
Okay ... I will be nice ...
Backup your database ...
In the Tools ... Insert SQL Patches ...
To turn off products_model on all customized meta tags
PHP Code:
UPDATE products SET metatags_model_status = 0;
For new products you can change the default setting in:
Catalog ... Product Type ...
Edit Layout
Show Metatags Title Default - Product Model
Display Product Model in Meta Tags Title 0= off 1= on
And, then you can maintain these as you like from that point on ... on a per Product basis ...