I got the 3M - Anti corrosion under chasis treatment done by 3M - OmSai Motors located at Cosmos Mall, ITPL road(Near AECS layout, Marathalli). This is a place where you can see the job done in front of your eyes.
Total cost - 2400+ taxes for Fiat Palio
Palio already comes with a paint protection system on most parts beneath the car. Just wanted to give another coat so that the following benefits are achieved.
Enhanced anti corrosion system
Enhanced road noise insulation
Prevention of underchasis damage caused by stone chipping while driving fast
2 litres of anticorrosion(rubberised paint) was used. If you are planning to do this I would suggest you to do this at 3M centres cause u can see it happen. It would take appoximately 1 hr 30 minutes for the job. Once it is done you will be provided with a 5 year warranty card and 6 month periodic underchasis checkup card too. I think this is a good option cause, once every 6 months we can get a look at the state of the car under chasis. If there is any gap or damage due to stone chiping another coat on that part will be provided it seems.