as a marine engineer, at a drydock, every working day we have painters working in conjunction with my teams, my painters always mask any mechanical parts, ie propelers water inlets, vents stabilisers etc.
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in your original post you said these quys were car restoration specialists, either
A: as restoration specialists they should know not to blast internal engine components but
[ incidentally, my painters ues VERY powerful jetwashers
, not sandblasters.
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to blast the loose paint and barnicles off the underside of our boats]
B: if they blast all their own covers, and they dont blow up their clients engines, then they must clean or mask them more thoroughly than they did yours, ie negligance.
however.
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in a previous chapter of my life I was a lorry driver, in one of the firms I worked for during this mini career, we had a lorry engine overhauled, it came back running low oil pressure.
that driver reported it, the transport manager discussed it with our garage, they went to the the engine suppliers, who said it was a characteristic of that engine?
years later but still within the warranty period of that engine, if lost all oil pressure and consequently failed.
during t ensuing postmortem it was discovered to have been a piece of carbarundum from the glaze buster had embedded itself in the valve seat for the relief valve on the oil pump.
through the firms weak management we hadnt doccumented the whole low oil pressure thing hence, had very little ground to stand on.
afik, bearing in mind I moved on during this process, we went to court and won a partial cost settlment from the refurbisher.
but only because we had an independant chartered engineers report who i believe as part of his evidence sent the offending particle away to an independant lab for analysis.
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moral of the story.
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get a sample of their sand as evidence.
re who do i think was to blame.
both.
today we started to rebuild an engine we stripped last week, overhauled the components on the bench at the weekend, despite jsut being overhauled by ourselves, the first thing we did this morning was clean every component again, and the last thing we did before bolting them in was clean them again.
but if your reciept says blast CLEAN and paint, yor fire proof because the patently havent cleaned it completely and by being a car component it is tacitly specified as needing to be surgically clean.
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