Hi rustic charm,
I was in contact with PPG Sigma here in Norway
looking for the often praised Ameron paint
system. The representative said Sigma bought Ameron, and so I suppose the Sigma paints are as good as the old Ameron brand. He suggested I should use Sigma prime 200 as first two layers, and then Sigma dur 500 (polyurethane) as top coat.
Unfortunately, he could only send in 20l buckets, which is too much for us since we are not planning a major overhaul
soon, but need something reliable for small spot fixes. On this forum, I often read people use Rustoleum systems for above waterline applications - I finally found that product here, and it was suggested by the shop person as the best choice, too. Was sold out on Friday, which is bummer since this is a dry and warmish weekend, but I'll try next weekend.