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Wed 14 February 2007

More cleaning / sanding of the panel parts. Ended up using cotton buds with acetone to finish the holes / edges.
Then more of the old system - firstly a acid wash and then a light self-etch primer coat.
Then the new stuff - this Standox EP filler surfacer - it is designed to provide an epoxy layer with high solids and then be run down. 2 Pack plus thinners.
Once everything was coated - into Otago Sun Mark 4 for baking.
Close up of the finished surface - looks good and solid, still slighty soft at this point. Will need a light rub down to get a smooth base but looks tough and solid.
We had significantly more EP filler mixed than we needed and rather than wasting it I decided to put a quick coat on the upper cowl surface that I spent time micro-ballooning / sanding way back when. Masked front and back edges (will probably need more glass work in these areas) and wiped down with acetone.
Finished EP filler - looks REALLY good, some light pin holes on the lower edges, but the bulk of the surface is solid and without issue. I've been expecting the surfacing process to be exacting and today's result back up the principle - lots of effort in the micro-balloon process makes the priming look simple / easy. If the pre-work isn't done (like on the nose gear leg that I also tried) the pin holes show up really badly ;-).
Carl Morgan