Can I add two different 3D models to the same product?

No. The 3D Customizer allows one model per product. If you add a model for a product that already has one, the new model replaces the old one.

For different finishes, you have two options:

• Make one GLB and use the configurator. In Plugins → 3D Customizer, edit the model, tick Enable configurator and add a choice for each finish (for example a Color group with Walnut and Oak).
• Sell the finishes as separate products, each with its own model.

When editing a model, the product cannot be changed. To move a model to another product, Delete it and use + Add 3D model again.