I was an incredibly impatient and volatile kid when I was a wee lad. So for my 10th birthday, back in 83', instead of the usual Lego, I received a pile of plastic kits, a tube of polystyrene cement, a selection of Revell enamel paints and some cheap brushes. My father cleared a bit of desk space in the attic, under the small skylight, and got me an old mustard jar filled with terpentine to clean my brushes.
And that entire summer vacation, I spent in the attic, glueing and painting those Revell and Airfix kits. Some actually went flying through the attic because of my frustration, but come winter, I had been transformed into a very, and later even incredibly, patient boy.
Over the years, I became very adept at using enamel paints, eventually getting used to all of their characteristics. So much even, that I remember painting Tactical Air Command patches on the sleeves of 1/72 pilots, using the tackyness of the paint to create very thin lines (the sword on the shield, if anyone knows what it looks like

)
So I was very confident in my abilities with enamels when I came into contact with GW products. When visiting a hobby shop in '88/ '89 looking for model kits, a box of RTB01 Beakies cought my eye and on a whim I bought it. Eventually, I painted it with my trusty enamels (black Dark Angels with red markings), but I didn't know what to do with them other than that (didn't know about the game).
Then I saw a commercial on TV for MB's Hero Quest game, and I thought; that looks like those guys I painted, and I knew I had to have it. So I bought the box and painted the entire contents (plus all expansions) with enamels again.
And I remember seeing the painted minis on the side of the box and thinking; 'that's not possible; those pictures must have been manipulated'.
A couple of years later, I went to a gaming convention with some friends (must have been in '92; I bought my first WD there; issue 145), and saw my first Roge Trader gaming table. Besides being completely gobsmacked by the coolness of it all, I now finally saw with my own eyes just how detailed the minis were painted; with acrylics.
So it was possible after all.
The guy who made the table and painted the army gave me two of the greatest pieces of advise I ever got in my hobby life:
1) Switch over to acrylics; you'll never look back
2) Any piece of packaging can be a cool Scifi building, just add some huge numbers and a couple of hazard stripes
The second advise certainly was true, but the first one was a complete game changer!
I bought my first set of Acrylics (GW starter paint set; hex pots with white flip tops, some of which I still have and occasionally use!) not long after and it was as foretold; I've never looked back once...