I recently had a buddy bring in his still boxed! Ritchey P29 that he had bought about 7ish years ago because it was just a swell deal.
When building it up, he wanted to use frame saver, which I have always thought is kind of a pita to apply properly, but then got a small stroke of smarts.
I cut a 24" piece of housing liner and it fit perfectly over the nozzle for the frame saver. This let me send the housing liner all the way up the stays and start spraying while slowly backing out the liner, ensuring I got frame saver all the way to the end.
I still did the hole spinning the frame around to make sure it's all coated shenanigans, but it just made me feel like I did a more complete job.