thats good then
unless its rust 
impossible to say.
dont forget hgf mite be covered but oils, water, hoses, other things normally aint - so it might still cost yu a packet!![]()
unfortunately Cashew, warranty companies arent quite so terrified of Ming and Porky as we are. Even less of Slob. Bless him!
when I had my hgf done - the warranty peeps sed "normal consumables and wear and tear aren't covered by the warranty". maybe thats just warranty direct for ya
thats how they got out of the oils, anti-freeze etc and because I insisted on liner heights and porosity tests on the heads - they used the excuse " its not necessary - get it done at your cost!"