Once you have put the Waxoyl down the tubes a spot of silicone sealant over the holes to prevent anymore water ingress helps. If you take the mudguards off it is worth getting them stonechip painted on the undersides and then some waxolyl over that as well. The mudguards are very prone to corrosion, so do all you can to protect them....or get some G56 ones, if you are feeling flush.
