i've tried it personally..wad i can say is,RM30 is way too cheap if u see the results..the windscreen might seems very clean to most of our eyes but after u apply the watermark powder,everything comes out..
it doesnt juz remove watermark,it remove wiper marks as well..i wish i could buy more n stock up for future use.haha..
regarding on how many packets needed for whole car,cant give any comment. xD since ra2boy already mentioned 4packs(maximum result)
i help my fren apply on his windscreen,he's been using RainX all the time,got beading n repelling effect as u all noe,after apply the watermark,it strip down everything to its 'virgin' state...i'll post pictures n 1 video to show the results.
anyway, definitely a very good product!

This is the wiper mark that are invisible to naked eye..everything comes out after initial apply of Rainaway Watermark Remover


a very clear comparison of Before/After..
use a sponge to rub on the windscreen until u get results like the one on the left then ur done..ready to rinse off.


Crystal Clear..follow by Rainaway Nanocoat then ur windscreen is protected throughout the year!


cant seems to post the video..



This post has been edited by michaelyii1988: Jan 17 2011, 12:18 AM