Hi all 
We are going to render the walls of my breeze block shed so I'm gathering together the rendering gear required. Trouble is, I am a complete novice when it comes to anything to do with plastering and rendering so I am hoping you would be so kind as to help me out. To that end, I have got a few questions.
Trowel
I'm not sure which steel trowel to go for. All I know is I'd like a 14" sized one - but which one specifically, I don't know.
I don't want anything too expensive because this is a 'one and done' project and I'll very probably never use one again. I've also got to buy one for a friend who's helping me so I would like to keep the cost down.
I was looking at the following, would it do the job?
www.ebay.co.uk/itm/DEKOR-GERMAN-STAINLE ... 1791228962
Coverage
The shed is 6m x 5m with a 2.4m opening for the patio door. Going by this size, how much render sand and cement should I get?
Plasticiser and Lime?
I've been watching a few Youtube videos and they said to use plasticiser on the scratch coat and lime on the outer. Something to do with lime being more suited to the outer render. Is this correct?
Mix
I've also been told to go for a 6-1-1 mix for the breeze block. Is this right?
Thanks all for your time and patience, it's much appreciated.

We are going to render the walls of my breeze block shed so I'm gathering together the rendering gear required. Trouble is, I am a complete novice when it comes to anything to do with plastering and rendering so I am hoping you would be so kind as to help me out. To that end, I have got a few questions.
Trowel
I'm not sure which steel trowel to go for. All I know is I'd like a 14" sized one - but which one specifically, I don't know.
I don't want anything too expensive because this is a 'one and done' project and I'll very probably never use one again. I've also got to buy one for a friend who's helping me so I would like to keep the cost down.
I was looking at the following, would it do the job?
www.ebay.co.uk/itm/DEKOR-GERMAN-STAINLE ... 1791228962
Coverage
The shed is 6m x 5m with a 2.4m opening for the patio door. Going by this size, how much render sand and cement should I get?
Plasticiser and Lime?
I've been watching a few Youtube videos and they said to use plasticiser on the scratch coat and lime on the outer. Something to do with lime being more suited to the outer render. Is this correct?
Mix
I've also been told to go for a 6-1-1 mix for the breeze block. Is this right?
Thanks all for your time and patience, it's much appreciated.