This area has 1x8 pine boards, some of which are unfinished (just had roof replaced) and some with very uneven and old paint. I figure to prime, probably with Tinman's formula, posted in this newsgroup back in 2001:
1). 75% Zinsser's Cover Stain or Pratt & Lambert Suprime. 2). 15% Flood's Penetrol. 3). 10% Naphtha. 4). Add Japan drier (at one ounce per quart). 5). Tint to tonal range of topcoat
I'm not sure what to do about the already painted surfaces. Maybe scrape or fill or sand, I just don't know. I assume the existing paint has lead content, since the exterior of this house hasn't been painted since the 1970's, maybe earlier, in all probability.
I'm wondering also how long I can delay painting after applying my prime coat. Being color blind, I'm hesitant to decide on a color scheme. I figure I'll probably use a Benjamin Moore acrylic exterior paint, probably 3 colors - one for walls, one for window frame, another for sash. Possibly, I'll use the window frame color for the rafters and soffitt bottoms.
Thanks for any help.