We paint large flocks of birds all the time, especially migratory season with geese.
Birds are cool
Yes they are, I use to go birding quite often. However, I think my use of "painting" may be confusing, I'm speaking of a radar skin paint, not brush and easel.
As the owner of several marine radar units (one of which I sometimes roll out of the garage when a storm is coming)
Okay, he with the most toys wins. 
Not really toys to me, been in the MW and hi-tech sectors most of a fairly long career (to the degree that I have an oscilloscope collection).
A hint: Not many can justify spending on a new, modern digital radar set, starting around $4K going to tens of $Ks, IIRC. Some high end models are even Doppler.
But if you put in a running search on eBay, you'll turn up quite a few older model analog (marine) radars for reasonable prices.
Still not usually cheap, unless you look at a non-working but repairable one. But you might find a decent analog unit starting at around $500, although most will be $8-900 to $2K, the cost of an (overpriced) decent Davis WX ensemble.
Most of these will have a monochrome CRT, but some LCD color units are out there. X-band powers range from maybe 1KW to 6KW (pulsed), with ranges from 6-8 miles to 48 miles (higher powers available, but expensive, 8-40KW+).
Don't recommend having body parts in the beam path (usually X-band, ~8-12GHz, or $Sband, 2-4GHz--which would probably disrupt WiFi, etc., for miles around).
Almost all will accept a GPS input, usually in NMEA format, which allows accurate positioning of 'own ship' and targets (storms).
Of course they'll work better on a marine environment or flat, uncongested terrain, but you can compensate to a degree.
Some things like certain structures, hills and mountains, a city environment, etc., probably prohibit any effective use of a radar. Unless the scanner (MW antenna) is considerably elevated, which brings up the need for an expensive extension cable (fairly hard to find used, maybe impossible new).
BTW, a dome (enclosed) antenna is probably better than an array type (rotating bar) for most uses, but doesn't look as cool. The larger higher power units tend to be array antennae.
https://en.wikipedia.org/wiki/Weather_radar
