I like the POR15. Use old clothes, throw away brushes and wear a mask as well as hove some air movement.
Alvin..latex or nitrile gloves...you
forgot the gloves man!
(I'm speaking from experience of course...)
Good advice on the chassis grounds though.
Like Alvin I favoured POR-15,my truck's an all year driver (my daily) and as such suffers everything a Scottish winter can throw at it,including salt.
I'm pleased to say after two such winters and 6000+ miles it's holding up well.