BLOBBY BLOBBY BLOBBY !
Not sure if it's lack of paint or spraying from different distances.
Actually looking again looks like lack of paint. Painting a case properly, even with rattle cans is very expensive. You need to paint on thick enough layers to cut back with P800 between coats. And then of course enough laquer to be able to cut, wet sand and buff the crap out of for a mirror shine.
Good finishes with rattle cans are very possible providing you know what you're doing and use enough paint and put the time and effort in (IE lots). when I painted the Radiomactive I ended up using 5 500ml cans of yellow, 3 500ml cans of pink, 5 cans of primer and 4 cans of laquer.
IIRC I spent about $70 on paint alone.