Should I varnish my oil painting?

Related questions

1. Can I use olive oil for oil painting?
2. What is an alternative to oil paint?
3. Do you need paint thinner for oil paint?
4. Can you thin oil paint with nail polish remover?
5. What is dry oil?
6. Can I thin acrylic paint with water?
7. Can you use olive oil as a medium for oil painting?
8. How can you tell the difference between oil and acrylic paint?
9. Will adding water to paint change the color?
10. Can you speed up oil paint drying?

Tags

1. #properties
2. #durable
3. #finish
4. #surface
5. #stable
6. #however
7. #matte
8. #painting
9. #their
10. #change
11. #paint
12. #varnishes
13. #gloss
14. #doesn
15. #necessary
16. #protective
17. #aesthetic
18. #varnish