Yes, use this, it'll make subsequent cleaning so much easier.
For winter, personally, I prefer to use a sealant rather than a wax (which I use over the summer months) purely due to the durability. Jeffs Werkstat Acrylic works very well and will easily last a couple of months if applied correctly, but this time I've opted for Poorboys EX-P to see how that lasts. With the latter particularly, you can top up with wax too if you like.