Make everything around you look shipshape and professional. A wise lady once told me "A project isn't finished til there's a "finish" on it. Get it?"
Any object tends to look like crap after it's been outside for a while. Metal rusts. Paint flakes off. Wood discolors and starts to crack. And the project you spent so much time on is yet another eyesore to irk the normal people.
A spraygun is the magic wand that will solve your problem. It really is just like magic.
Paint a multicolored object all one color, and it suddenly looks like a real thing, not some crap stuck together. Paint it white, black, or grey to match the theme of your surroundings, and suddenly it vanishes. It's become a part of the surroundings. No one would think of making you get rid of it.
I just made this metal hand truck look like part of the solution.
A few minutes ago it definitely looked like part of the problem.
Stuff you'll need:
Filter Mask with organic vapor (charcoal) cartridge
Angle Grinder with Cup Brush
Sticks, rags, and something ugly, rusty, and dry to paint.
Here's the motion you'll be making with your spraygun: