Hi all,
I was reading through the rattle can discussion and thought a head to head comparison might be useful. I am acquiring as many variations as I can easily find. I have self-etching primers from Duplicolor, Marhyde, SEM, and rustoleum so far.
The question I had is how to set up the test. I was going to start with standard alclad. I thought I would do a strip with just careful cleaning. A second one scubbed with red scotchbrite. Maybe a third with scotchbrite and an acid etcher. When I built my RV8, I went totally nuts on this. I scuffed with scotchbrite in an alumiprep bath (phosphoric acid). I then conversion coated with a product whose name escapes me. Works like Alodine but uses a potassium permanganate solution that is totally non-toxic. Followed that with Azko-Nobel two part epoxy primer. The end result is hard as nails and impervious to everything--but probably cost me a year in building and who knows how many brain cells.
I'm starting a -10 and plan to prime all surfaces where metal touches but not the skins. I think a good rattle can is probably quite adequate. I am waiting for the empennage kit to arrive so I have time to experiment. Any thoughts as to additional tests?
Regards,
Michael Wynn
RV8 flying
RV10 Starting
I was reading through the rattle can discussion and thought a head to head comparison might be useful. I am acquiring as many variations as I can easily find. I have self-etching primers from Duplicolor, Marhyde, SEM, and rustoleum so far.
The question I had is how to set up the test. I was going to start with standard alclad. I thought I would do a strip with just careful cleaning. A second one scubbed with red scotchbrite. Maybe a third with scotchbrite and an acid etcher. When I built my RV8, I went totally nuts on this. I scuffed with scotchbrite in an alumiprep bath (phosphoric acid). I then conversion coated with a product whose name escapes me. Works like Alodine but uses a potassium permanganate solution that is totally non-toxic. Followed that with Azko-Nobel two part epoxy primer. The end result is hard as nails and impervious to everything--but probably cost me a year in building and who knows how many brain cells.
I'm starting a -10 and plan to prime all surfaces where metal touches but not the skins. I think a good rattle can is probably quite adequate. I am waiting for the empennage kit to arrive so I have time to experiment. Any thoughts as to additional tests?
Regards,
Michael Wynn
RV8 flying
RV10 Starting