No.
Hypothetical analogy.
1. You buy a corvette.
2. You modify the corvette so as to have overall a different shape, more vents, and style and better spark plugs.
3. You take off or sand down all references to the original manufacturer and rename it to be Curvette.
4. Chevolet takes you to court and you're left penniless.
How would you feel, if someone downloaded your work, made some simple improvements and sold it for half of what you were asking? Who would the customer's go to? Your model that you spent weeks creating, or the other person, who spent 15 minutes improving your design.