I have a page www.mynautics.com and I am testing structured data now.
All data is correctly downloaded by Google and shown in structured data testing tool, but is not showing in Google results. I believe that is due to a lack of category data.
But looking trough Google's taxonomy (https://support.google.com/merchants/answer/160081) I can not find proper category - watercrafts or boats...
Should I just put ads on my website in category Vehicles & Parts? Is there any better solution?