It sounds like things are going well for PAPS.
You did touch on something I really haven't mentioned.
Over time, most lead/acid batteries develop small leaks around their battery terminals. It is usually too small to see but it is large enough to allow some of the batteries acid to contaminate the terminals.
If this happens the terminal and the wiring connector can corrode.
Most of the corrosion is not conductive to the flow of electricity so the power that is in the battery can't get to the places it needs to be to do things like crank the engine, power the lights, the ignition and fuel pump on fuel injected models.
The corrosion can also reduce the amount of power from the alternator so the battery does not get recharged like it could and should be.
Removing the wires and lightly scraping any dull looking oxides off of the terminals and wiring connectors will get things back to normal.
Also, applying a bit of Vaseline or dielectric grease to the terminals/connectors before reassembling them will prevent future corrosion.
Gasoline (Petrol) contains a lot of different additives to do a number of things ranging from increasing the octane to cleaning carburetor jets and fuel injector nozzles.
Most of these things do not burn so they become deposited on the interior of the silencer, often looking like brown or tan dust.
It is normal and nothing to worry about.
As for flashing lights, to each his own I say.
If they don't look like turn indicators and the law doesn't have heartburn with them they could actually be a benefit.
The unusual nature of flashing lights will call the attention of drivers to them so they are more likely to see you.
If they see you, they might not pull out in front of you.
Then again, they might so NEVER trust anyone or anything to do the expected.
Ride safe.