anybody got any tips on the process of undersealing? my 3i's comin out the bodyshop soon and thats the next thing iv gotta do, i have got access to ramps at work so i can get under there no probs. im not too sure on the best way to go about cleaning the underside up first though?

cheers.

 

scrap all the loose crap off and wire brush it, the best way to put the new stuff on is with a gun, just cover all the stuff you dont want covered in it.
thats how i do it anyway

 

after you wire brush it ,use waxoil [black] and not underseal as underseal goes hard,water gets trapped behind it and the car will rot from the inside out, or you could use schutz as this now has waxoil added to it for that reason