Is there a permanent way to remove sun spots?

Great question. Be sure to see a very experienced laser specialist to make sure these spots aren't melasma. If it is, fractional laser is the safest option. If they are just sun spots, then IPL / BBL is your best bet. Once a spot is removed, it is gone for good, however with new sun exposure and time, new spots will appear, so people do best with a few treatments a year - just like exercise or getting your teeth cleaned. The good news is that these treatments do a lot more than just remove the brown. They slow down the rate at which your skin ages.

Hi, 
The short answer is "No".  Sunspots develop as a cumulative result of life time sun exposure and ageing skin, and sometimes maybe precursors of non melanoma skin cancers such as Basal cell carcinomas or Squamous cell carcinomas.  Also you are likely to continue to develop more new solar keratosis as you treat existing ones. If it is a skin cancer, it will need to be treated in its own right.
However you do have many choices of how you treat solar damaged skin - cheapest method liquid nitrogen (complications may include hypo- or hyperpigmentation, scarring), Topical chemotherapy cream, chemical peels etc.  Expensive methods include Laser resurfacing.  Every method have its own advantages and disadvantages, totally depends on your desired goal, downtime, cosmetic outcome, budget.  Find a good doctor to examine your skin for cancers first.  Discuss with your doctor to see which treatment is suitable. Protect yourself from further damage using a really good sunscreen, hat all the time.  Good Luck.