How much waterproofing spray to apply to my softshell jacket

Question

I have a Showers Pass Portland Rain Jacket. The manufacturer recommends using Nikwax TX Direct Spray On to maintain waterproofing properties. How much should I apply to the jacket? How do I know if it's too much or too little?

Relevant Links:

Jacket Care Instructions

Nikwax Tx Direct Spray

Answer 1

From the Nikwax link you provide:

For best results remove all non-washable parts and always clean item(s) first with Nikwax Tech Wash®. No need to dry item(s) before waterproofing.

• Protect working surface and lay clean wet fastened garment flat.
• Hold bottle 15 cm/6 inches away from garment.
• Apply evenly to outside of fabric.
• Wait for 2 minutes. Remove any surplus product with a damp cloth.
• Check carefully to ensure no areas have been missed.
• After several minutes check for and remove any surplus product with a damp cloth.

Sounds to me like you should spray in on evenly almost to the point of saturation, and remove any excess... (excess is usually the result of over-saturation).

I suspect there is not any hard-and-fast rule, otherwise I imagine they would be more specific.

I'm a fan of more-is-better approach (... to life).

If you use too little, you'll probably notice next time you wear the thing.