Yep don't kid yourselfs that the mk6 will be any better than the mk5 as it's essentially the same car/chassis!
Poor design where wing meets sill and absorbent sponges stuffed inside wings that will rot them from inside out nicely
My mk5 is rust free, 1st thing i did when bought it was remove arch liners and trim back those sponges and then apply a few layers of Bilt hamber S50 clear wax/corrosion sealer killer to inside of all arches as the rear arches are known to rust too!
Plenty Hd wax applied around the rear VW boot badge/handle too
That's the first thing I did too, wheel liners out, good clean out, sponge thing out and I did that on all four corners and also clean the under body and applied bilt hamber dynax UC to underbody and wheel arches. Was no signs of rust then when I did it, don't think it matters what you do it'll happen stuff like this needed doing years ago.
I know it's the same car but I was hoping vw would of sorted some of these issues out on the mk6. Looking to sell have been thinking I fancied a change a while now so now is a good time. Was looking at mk2 focus rs and the mk2 focus seems just as crap with rust as the mk5 golf
Just got back from ibiza on Tuesday and the amount of old cars out there is amazing, mk2 golfs, renault 5s etc. uk climate.....