This is pretty much what I have been doing all summer. Now that the weather is truly shit, I am blow drying my chain with compressed air and then applying squirt after each ride. I think the longer you let the wax sit after application the better it wears in the wet. If it's still wet, it will just wash away so the 24 hr drying time may be important.
The silica stuff looks impressive and now that I know that the bag of wax can work as it's own crock pot in my ultrasonic bath, the whole melting thing got a whole lot less troublesome.
I think when I burn through my current squirt supply, I'll give the silica solid wax + liquid top up a go.