Various external devices have been fabricated and sold to keep the breather mung off the belly of VW powered airplanes. SONEX sells one.
My VW Engine Sensei (R.S. Hoover, "Veeduber") taught me to keep all that crap inside the engine. The cam gear sprays a lot of droplets toward the breather. The stock VW has a little louvered plate that fits between the top of the case and the generator/alternator tower to knock that down, and the surface area of the tower itself cools down the vapors so it condenses, and by the time it exits the engine, it's relatively clean, just exhaust gases, water, etc.
None of this happens with the stock Aerovee breather.
Veeduber would stuff as much stainless steel scrubbing pad, trussed up with safety wire, as would fit in the void at the top of the case, below the block off plate. Due to the rubber novelty, sourced from a late 1960's Camaro, used to connect the AeroVee plate to the breather tube, the stock baffle won't fit. So I fabricated one. It acts as an inertial separator, by changing the flow direction, any droplets that get past the pot scrubber (think stainless steel breathable foam) fall out of "solution" when they can't make the corners to get past the baffle. My rubber novelty is ozone checked, and it took some digging to find a replacement (Dorman 47052, available everywhere).