Sorry, BSD = (Sonax) Brilliant Shine Detailer
Here's a little list of things that you might find useful to get you started:
2 x buckets (20L plasterer type ones are cheap and ideal). Write 'Rinse' and 'Wash' on them with permanent marker and change the water if it looks dirty
http://www.amazon.co.uk/LITRE-PLAST...F8&qid=1439882177&sr=8-1&keywords=20l+buckets
2 x Grit guards, once you've used them you'll realise that they do trap a lot of debris:
http://www.amazon.co.uk/Scratch-Shi...F8&qid=1439882332&sr=8-1&keywords=grit+guards
Wash mitt:
http://www.cleanyourcar.co.uk/washi...nges/premium-lambskin-wash-mitt/prod_984.html
Shampoo - you can get anything you want that suits your budget but look for ones that won't strip wax (unless you want them to). I like:
http://www.bilthamber.com/auto-wash
and
http://www.cleanyourcar.co.uk/washi...poos/chemical-guys-maxi-suds-ii/prod_165.html
Wheel cleaner:
http://www.bilthamber.com/auto-wheel-113
Quick Detailing spray, this really looks good on Apollo Blue, which IIRC you have. It's also great for glass, plastic trim and dash:
http://www.cleanyourcar.co.uk/detailing-sprays/chemical-guys-pro-detailer/prod_662.html
Drying towel - pat the car dry with one (or two) of these. Once the majority of the water is off the car then I start using a detailing spray and buffing cloth:
http://www.cleanyourcar.co.uk/micro...-huge-39-fluffy-39-drying-towel/prod_634.html
Buffing/polishing cloths:
http://www.cleanyourcar.co.uk/micro...shag-pile-double-density-towels/prod_436.html
Polishes/waxes/glazes and sealants - there's loads to choose from. You ideally want to fully clean the car, correct any defects with a polish and then seal with a wax or sealant (LSP - last stage product). Some polishes will just mask and fill swirls and marring others (when worked correctly) will remove them altogether but they will take a long time doing so by hand.
As an all in one polish and LSP then I can throughly recommend this stuff. This is the cheapest you'll find it in the UK and it comes with an applicator pad and half decent buffing cloth. Easy to apply and offers good protection.
https://www.nielsencdg.co.uk/acatalog/Armorall-SHIELD-Polishing-Wax---500ml-ARM_17500EN.html#SID=255
Wheels - I've tried a few different wheels sealants and they all claim to stop brake dust build up and make the wheels easier to clean. I've so far only found one and it's the easiest to apply too (again, cheapest place in the UK)
https://www.nielsencdg.co.uk/acatal...Wheels-16300EN-300ml-ARM_16300EN.html#SID=367
Tyres - Again, lots of choice but my favorite is this stuff. Seems expensive but a little goes a long way and a bottle will outlast several aerosols so good value in the long run:
http://www.cleanyourcar.co.uk/wheels-and-tyres/chemical-guys-new-look-trim-gel/prod_143.html
and applicator pad:
http://www.cleanyourcar.co.uk/wheels-and-tyres/trim-tyre-dressing-applicator/prod_340.html
There's two more things you may wish to think about, snow foam (and lance) and claying.
Snow foam and lance - not essential but
help remove a lot of contaminants before you start to wash. You'll need a pressure washer though.
http://www.theultimatefinish.co.uk/car-care/snow-foam-lances.aspx?page=1
Clay bars - Great at removing stubborn contaminants that washing alone can't shift. Ideally should be done 1-2 times per year before doing a 'big' wash where a polish and wax are applied. After washing your car, stick your hand in a sandwich bag or one of those petrol station forecourt gloves. Run your hand around the car and if the paint feels rough or grabby then you should think about claying the car.
I've been using this stuff recently and found it to be great. It can be 'lubed' with water alone which makes it good value though I add a little bit of detailing spray to the mix, approx a 1:4 ratio:
http://www.bilthamber.com/auto-clay-medium
I hope this helps. I've picked a few things that I know work well for me and the colour the Leon and are also good value IMO. Yes, you can spend a lot less but you can spend a LOT more too. You can buy things in bulk which makes sense in the long run. The Pro Detailer, for example, I buy in a gallon size container as I use quite a bit of it and the smaller bottle doesn't make much sense but I tried it first just to make sure I like it.
Take a look on You Tube for
how to guides. Those Polished Bliss guides are pretty helpful and Chemical Guys have their own You Tube channel which is pretty good too.
Don't blame me when you spend 8 hours cleaning the car this Saturday