elephant wrote:In bodywork, they can no longer use only water-based paints. Much more expensive unfortunately.
Arf, yes but the funds are always with solvent, if you want something that holds. Otherwise there is the awesome epoxy primer (but then it releases a max too, and to clean the gun, you need solvents that tear off: since it is GLUE;) And then on it you still have to a surfacer ...
And besides, it also depends on what you had before, chemical compatibility question!
So it’s forbidden, hate the products, they sell them to you anyway
And the problem with water-based paint is that it's almost impossible to apply it if you don't have a cabin (respecting the temperature, ideal, humidity, drying, etc.) and of course, mandatory mask for everything!
As for solvents, truth be told, they are the worst: they are the ones the biggest destroyers immunity of the organism, because - not only - they destroy the impermeability of the cell membrane, but they dissolve the polyunsaturated fatty acids responsible for reconstituting it! (Of course, since these are solvents and that they are made to dissolve fat, whether by inhalation or tactile contact ...). So no, the "water-based" painting is not a step backwards, in fact! We will say that it is the lesser evil. But again, a water-based varnish is not great!
By cons I never understood a thing in bodywork, that's why we use a fatty petroleum ester, to pass on the bottom just before squirting the top coat (and / or included varnish if it's not 2k) - supposedly to remove silicone - while silicone residues mixed with petroleum are perfect repellents for painting !!! (Even in traces). If anyone has an explanation ...? Because chemically speaking, I find at my modest level, that there is no logic! (But necessarily, I must be wrong)