Get a half decent alarm. I have a Sniper alarm with a shock sensor, cost £22 delivered from eBay. If the door gets touched the alarm goes off. Criminals run before they even get into the car. I modded it so you can't start the car if you cut the power supply to the alarm. To get to it you have...
I've insured my car with 'exterior decorative changes' this covers me for everything I do with colour coding, stickers, bonnet scoops etc etc. So yeah, I have insured my stickers, you should do the same, it would suck if they didn't pay out because of a sticker.
I am trying not to make it personal but while you're driving around on the same roads my friends and family drive/walk on it is personal. If you injured someone and your insurance wouldn't pay out it could get quite upsetting for everyone involved.
And if you know that and still choose to do it...
Cost of declaring my mods: £35 a year
Cost of not declaring mods: What is it a 10 grand fine for now insurance these days? If I had an accident and someone is injured requiring on going treatment, that cost could run into the millions. You drive a micra so I guess you don't have millions.
A white dash will reflect really badly off your windows and you won't be able to see where you are going, it's why they are dark colours as standard.
Put some white paper on your dash in front of you and drive about in various lighting conditions and you'll see what I mean.
I had one on the marbella but got fed up having to empty it twice a week. I had breather to tank to mini filter. I started using an old coke bottle and a bit of hose pipe but upgraded to an alloy drinks bottle.