Cement ballast in an Alloy boat

Hi, looking at purchasing an alloy yacht.

I noticed that in a lazeratte compartment there had been some cement poured in (over the internal painted hull surface). This presumably had been for trimming purposes.

Is cement used in this way likely to be a corrosion issue?

Secondly, the hull has been fared using what looks like automotive body fuller. The faring appears in places to be up to 8mm thick. In one place where the hull has been bumped, the filler has fallen out.
Is faring Alloy hulls an accepted practice?

Thanks in advance

 

Is faring Alloy hulls an accepted practice?

Yes BUT , its more common to paint under the fairing compound with a 2 part epoxy based paint and use epoxy fairing compound .

Auto stuff "Bondo" shrinks a lot, is brittle and not water proof.

FAST FRED

 

Fairing (other than cosmetic touch-ups) of metal boats a sure sign of poor workmanship.....

 

....Or a vain effort to make a vessel appear younger than her years. Kinda like my Nana and makeup.