You can still get greases that are applied in liquid form but they now tend to be in spray
form. I personally do not use silicon oil or grease, it is fine until you need to repaint
your boat, it forms a film that is almost impossible to remove, even cellulose thinners has no effect and any paint
applied fish eyes and separates, there are dedicated removers but we tried one on a contaminated bike frame which had been blasted, with poor results we had to treat it several times and had to reblast it, we discovered silicone grease had been used in the bottom bracket.
Keep silicone away from any surface you may need to paint