You should check out the AutoVega InstaShine product.
Meanwhile all car-dealers will probably do 3M or Dupont 'teflon' coats.

Do check out how often it needs to be redone and what are the effective maintenance costs while comparing different products. Look at InstaShine notes as a reference on what to expect.

^{I was surprised to see AutoVega pages discouraging teflon coating with environment hazard reasons when most other places talk about there being no teflon in the coat at all.}
(ref: 4 pages of discussion over the last few years here).

If you need to get into details on detailing -- DetailingWiki page on Polymer Sealants.

To summarize compare products on these three points

1. What is the price
2. How often would you need to redo it
3. What is the technology
   (how they describe it, how you think it will help and what is your gut feel about it)

car-ax on bypass near balewadi stadium does a good job with 3M products. Quite customer friendly too.