First off, the easy questions. One, how do you determine how much primer to mix for a given length and size of tube? Second, should the outside of 4130 tubing also be primed?
Also, I recently saw a video, I think on YouTube, showing a novel way to prime the insides of pushrods. This gentleman suspended the pushrod vertically from the ceiling with a rag stuffed a few inches down from the upper end and a string tied on the rag and extending out the bottom end. He then poured a quantity of his mixed primer into the top of the tube and then proceeded to slowly pull the rag down through the tube. He ended up with the inside fully and evenly primed with no runs. Now I’m getting ready to work on my aileron pushrods and would like look at that video again with the idea if using that technique. I suspect that I can figure it out well enough for myself but would like to review the video for any missed details. Of course I can’t find it. Did anyone see that video and remember where they saw it?
Also, I recently saw a video, I think on YouTube, showing a novel way to prime the insides of pushrods. This gentleman suspended the pushrod vertically from the ceiling with a rag stuffed a few inches down from the upper end and a string tied on the rag and extending out the bottom end. He then poured a quantity of his mixed primer into the top of the tube and then proceeded to slowly pull the rag down through the tube. He ended up with the inside fully and evenly primed with no runs. Now I’m getting ready to work on my aileron pushrods and would like look at that video again with the idea if using that technique. I suspect that I can figure it out well enough for myself but would like to review the video for any missed details. Of course I can’t find it. Did anyone see that video and remember where they saw it?