There are several ways to achieve what you are doing, just understand that it is never a good idea and will never work great. What you are doing would be fine 20 years ago, or even today, if from Texas, all you need for ski pants is scotchgard and your normal tightass dooshbag cowboy jeans.
But I digress, the point being that while you MAY achieve some level of water-repellancy it is only going to work in 2 possible ways:
1. It will work on a mediocre level for a short period before reapplication is necessary
2. Whatever level it does work on removes breathability and in effect turns your jacket into a plastic bag.
Modern technology gives us lightweight, breathable, waterproof products across a huge range. If you just HAVE to wear your new Justin Bieber hoodie on the slopes, may as well just wear it as is and not get it wet. I mean c'mon, that kind of style comes with a price bro.
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