Rear Brake refurb

[fazersharp]

I was going to change pads and fluid and line after my MOT in April - after the MOT in case I potatoed the caliper. I now have anextra 6 months so am doing now.  I have read the various posts and advice but thought I would start my own as I have a few questions.I will be using a hel line and on the website it mentions black stealth heat shrink on the ends as an option. I actually think it looks a bit messy and my new line will be clear stainless steel but on the rear is there any reason to have the "stealth heat shrink.

• what is peoples opinion on hel stainless steel bleed nipples and what size do I need.
  
• Will 500ml of fluid be enough to do the job - even if I have to struggle with bleeding.
  
• What fluid to get - any make better than other.
  
• Pads SBS ceramic I see have been mentioned. I don't want anything too sharp on the rear
  
• seals webmoto Ebay or fowlers.I read it can be hit and miss with pattern ones but is that still the case.
  

A reminder for those that do not know. I have had the bike for 19 years 23k on clock and the last 19k of them have been dry ones only. Bike garaged. The rear calaper was last serviced at 8k in 2002 pads fluid and seals ( so the receipt says )