Do not believe all you read about the water based fence paints being sprayable. You only need tiny bits of over-dried stuff from around the lid and they will easy block the jets of the pump up pressure sprayer.
My advice is to buy a BIG funnel and ALWAYS filter the paint through a few layers of an old nylon stocking placed over the funnel. You will be amazed how many "bits" show on the filter. Since I started doing this the sprayer has worked very much better.
I advise you do the same when using the 'leccy sprayer you have bought
5 Precepts of Buddhism seem appropriate. Refrain from taking life. Refrain from taking that which is not given. Refrain from misconduct. Refrain from lying. Refrain from intoxicants which lead to loss of mindfulness