Re: Heritage One Ton - Replace Keel Bolts???
Any corrosion of the keel bolts is likely to be in the section that is invisible. Stainless steel seldom corrodes in the open, but when damp and not exposed to air.
The only way to be really sure is to drop the keel.
In the pics below the corrosion was not visible until the keels were dropped.
Living aboard in Victoria Harbour