When I did my rocker covers and engine front case I didn't use any primer. Just thoroughly cleaned off old bubbled coating, feathered the edges of well adhered coating, abraded the lot with 'green pad' and applied several light coats of smoothrite. I'm not claiming a showroom finish (it's a 17 year old 1100 after all) but it still looks the same as the day I bolted it all back together, two years down the line (this may be a good or a bad thing, depending on your viewpoint

).
<a href="https://picasaweb.google.com/lh/photo/ATpB4VsUwzLIdLBwoblURhJAieIP4IByCYmMpeOVcwI?feat=embedwebsite"><img src="https://lh4.googleusercontent.com/-aWi8-lDcfPQ/TG_4jA_I3YI/AAAAAAAADqA/r79-vBYhfbU/s800/IMG_5635.JPG" height="600" width="800" /></a>
<a href="https://picasaweb.google.com/lh/photo/hbrgsqboHln1wP5PgfCaOBJAieIP4IByCYmMpeOVcwI?feat=embedwebsite"><img src="https://lh6.googleusercontent.com/-aNhhS_X-r-Q/TG_4IdIdJJI/AAAAAAAADps/KqVSuGQNdK4/s800/IMG_5641.JPG" height="600" width="800" /></a>
<a href="https://picasaweb.google.com/lh/photo/kXMGBqyP8dpXxEeG11OVSMdIjVbFe8lpPsa0N09Tvn4?feat=embedwebsite"><img src="https://lh5.googleusercontent.com/-_1SZBjfyjGQ/TFGhgODLd9I/AAAAAAAADfc/QLlEULabNPY/s800/IMG_5575.JPG" height="800" width="600" /></a>
<a href="https://picasaweb.google.com/lh/photo/y4-tn4wX9n85O9pH2cyhhsdIjVbFe8lpPsa0N09Tvn4?feat=embedwebsite"><img src="https://lh3.googleusercontent.com/-flLNHDKZRlc/TFGhh8eGNbI/AAAAAAAADfg/HaxWq2K1GVA/s800/IMG_5581.JPG" height="800" width="600" /></a>