stripping queenslander casement windows soda blasting how?

hi can anybody tell me a time saving cost effective way to strip paint from casement winows?i have tried hot torch ,time consuming for the creases.dipped my self with some potent chemical i need license on windscreen to drive it home,it worked but after hosing drtig them out paint fell of 6 weeks later.pait stripper is messy timely i am now bought a bag of bicarb soda and want to use with home compressor but turned my neighbouhood wehite and wasnt really effective due to the pressure wrong ,read need granulated soda but where do i buy it in brisbane.has anybody stripped successfully their queenslander or timber windows and would swear by their method?