Water-based paints contain some oils that are used for paint surface lubrication.Once they have done what they were intended for there is no need to replace them. (paint cannot eat, therefore it doesn't need 'feeding') despite what Zymol marketing would have you believe.
The older
solvent-based paints contained a % of oils and replacement was required to avoid the resin drying out, these paints also required a time for the solvents to outgas (so called - paints requirement to 'breath')
In summary; paints don't require feeding nor do they breath
The
occasional use of a detergent wash (Dawn) will not have a detrimental effect on a paint surface or vinyl / rubber trim. Having said that other than a point of controversy that creates publicity, that was instigated by someone with thirty plus years of vehicle painting / paint systems. I see absolutely no purpose for using this type of product to prep a paint surface when there are far superior products purpose made for this,