Thought I'd provide a couple of tips I've learnt when applying rail tape over the years.
1. Make yourself a simple board holder (image below). It makes the job 10 times easier!
2. Cut each length in two i.e. rather than a single 1.8 M length down each side, 2 x 900 mm each side. Allows you to follow the rocker of the board and not have tape going under the edge (which never sticks well).
3. I've tried applying dry and soapy water. Dry leaves bubbles that are a nightmare to get out. Soapy water is too slippery. I learnt from the HexaTraction instructions to
just use water - allows you to reposition if needed, easy to get rid of bubbles and not too slippery.
Cheers Mark