Painting Just A Mansionette Balcony Wall..

[Soichiro 0]

My mansionette balcony wall is completely open to rain and sun, and it has kinda worn out within a year. Spoke to another painter, and he said that this is typical and I may have to keep repainting every few months.

The original painter used Dulux Weathershield that time (offers 5 years of protection?? didn't even last a year in my case), but not sure how many coats he used, or whether he used any primer at all, as the worn out parts look really thin and we can see the cement screed already.

Anyway, since it is only 1 wall, I would only need about 1 litre of paint.. problem is, seems that the smallest bucket of weathershield paint is 5L and costs $60-70. After opening, it is unlikely for the paint to last long so there would be alot of wastage.

Questions...

1) Is there any way to buy a smaller quantity of paint?

2) Do I need to apply a primer in this case, or is cleaning sufficient?

3) I already have a roller, tray, and brush for the corners, and lots of masking tape with newspapers. Anything else required? Turpentine for cleaning up I suppose?

Thanks in advance for any advise.