Cleaning Silicon off Aluminium

I am sure I am not the first.
I want to clean the silicon off all the edges of the caravan.
The previous owner thought he would fix the leak by siliconing every join and window on the van Without cleaning back the bits that squeeze out. Of course once a bit of dust has settled on it the once clear silicon now give the van a very dirty look.

Is there an easy way or product that will dissolve it?

Once it is all off I am planning to pull the windows and edges off and do the job properly along with a new paint job.
Are those retro 70"s snails ...they had character.

Actually this one is a dream to tow and don't bounce all over the place.

Also I think I read somewhere what the correct sealing compound to use is but can't remember now. I am sure someone will give me the answer.

Thanks in advance.