Chris. I agree with Clint, looks like a single colour which should have been 02 grey-green; they were re-painted white after fired on by their own Flak when the war started.
WL-APIE was one of the first 6 converted by Walter Bachmann ( a Heinkel sub-contractor) for ASR minus guns, first flight June 30 1939, then based at Norderney; the first ASR unit ( Seenotflugkdo. 1) was formed by Karl Born and officially the Heinkels were civilian not military ---hence the "WL" registration for ex-civilian aircraft. In 1939 these letters replaced the civilian "D" plus letters eg. D-OMYI which succeeded "D" plus numbers eg. D-921, though the former continued on many 2nd-line aircraft - including He.59s in 1940.
This is a handy site for German registrations, this page for "WL". Note WL-APIE is shown as a 59N but I'm sure it's a C-2 / ASR.
Regards
Nick
http://www.airhistory.org.uk/gy/reg_WL-.html