If you are going to use spray on fish oil, do it well in advance as it takes a long time to dry. 2 years ago I did a spray underneath and went over to the Island about a month later and I still have some sand stuck to fish oil and it won't come off with normal high hose pressure. Most of it has gone now but I think it is now to late to do it for this Xmas.
Lots and lots of low pressure water when you get home over several days is the best way to clean sand and salt. Even CT18 sprayed on and left over night helps as well.
My ute is now 9yrs old and goes to Fraser regularly and it has virtually no rust after initial spray rust proofing and a CAT electronic unit. Jury is out on which type is most effective.



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cheers

