Hi Gareth
That looks like a good package, and a DA is a good place to start from compared to a rotary, you are a lot less likely to do any damage while you get used to the machine. I'd buy a scrap panel from somewhere and give it a good going over, before you get started on your own car. Either that or get a mate with an old banger who will let you practice on it
You can damage the paint if you let it get too hot while leaving the machine polishing in one place too long and burn through, also on the edges of panels where the paint is a lot thinner. Also you need to make sure the car really is clean, then clay it, then mask it up with 3M tape as once you start you could drag a piece of dirt out from trim and really mess up your paintwork if it got on the pad
http://www.cleanyourcar.co.uk/accessories/3m-3434-masking-tape/prod_79.htmlIf you want to see how long it takes, how to do it etc, watch this to get an idea, it would take me ages to type it all up here!
You can buff out swirls etc from headlights and rear lights, use a very low cut product and go over lightly, I did mine and they came up great
VW paint is pretty tough, so it may take some time to get it swirl free. Its actually the clear coat you are polishing, and removing the "spiders web" type swirls should be relatively straightforward with the DAS-6. I wouldn't keep doing this to the same car though, without testing the panel you are working on with a paint guage (possibly borrow one as they are expensive) first, as each time you polish you are removing clear coat. Once you get the hang of the polisher and get confident with it, you will be able to achieve great results.
One tip is to always use the lowest cut polish first. You want to try and get a decent result by removing as little of the clear coat as possible. Tornado Red is a fantastic colour, make sure you get some pics posted showing before and afters
HTH