Storm Shield 1 Gallon

Thanks for the opportunity to ask a question. I want to apply a longer lasting coating to the pine siding on my home which is barely over 1 yr old. Present finish is 1 coat of translucent Sikken SRD Cetol, natural oak color. It has held up only under covered areas that receive no sun. The other areas, (2 coated wet where applied on sunnier exposures, 1 coated elsewhere), are not peeling but are looking poorly and nail bleeding is present on the 1-coat areas. Questions: 1) After cleaning per your label instructions, what is the longest lasting of your products that you would recommend that is still semi-transparen t or translucent? (I presume the new 1500 series?) 2) Do I need to strip off the Sikkens first?. 3) Can I re-apply your recommendation two or 3 years from now without stripping it off first? Thanks for your help.

What can I do fix this? Can I sand it down and recoat it? I stained my new deck last spring and it is peeling mostly on the flat parts where the sun hits it most. If needed I can send you pictures.

We purchased the Storm Shield in honeytone to stain four new cypress shutters about six months ago. We live in South Lousiana and it is humid here. The shutters are already showing tons of mildew-I can send pics if you want. Why did this happen? This product says it is mildew resistant and I would expect it to work for longer than six months. I applied it as instructed on the label.