You know nothing about me or what brands of paints I use or recommend.
If the beginner has a bottomless budget then you are absolutely right (and you can quote me on that). They can buy two of everything and have a whale of a time seeing what results. If they are nervous about wasting money and just want some idea of what a new medium is like to use, then sticking with one brand is hardly bad advice.
Of course, this assumes that they might actually care what the finished piece looks like. If they are into abstract expressionism then they can mix brands and media and supports and hope their artist statement sells it - assuming they want to sell it that is
Andy D.
'I'm a great speller - but a hopless tpyist!'