Ya, I've been slow working on the bike, my cheapness keeps me going to eBay China for parts and well, delays things a while. At that point where I'll pay extra if it's in Canada just to save the time.
That being said, I've been going through and flushing whatever I can find. Oil, final-drive, brakes, rad... it was essentially parked and left untouched since '89 in a barn. Tank took forever to clean all the gooified gas out of.
Still debating the POR15 for the tank. It's in great shape. I filled it with molasses and water (1:9) and after a week there wasn't spec of rust. Then flash rusted in under an hour before got the engine fogger in it. But reviews online, regardless which fuel tank liner used, are so 50/50.
But ya, so much old crap in that bike that I want to clean/flush everything before I try starting it.
When I got my 'Wing it had sat for 10 years, 6 of them outside and then another couple of years in my shop. I scrapped both master cylinders and the brake lines because the fluid in them had crystallized but I managed to save the calipers. I was lucky that the original owner had drained it completely - have you ever seen what you have to go through to get the tank out of a 'Wing?
As for lining the tank, from everything I have read making any of the brands adhere properly all comes down to doing the prep work exactly right.
Ya, you never really know if the reviews are from people who did it properly, or rushed it and blame the product.
As you can probably tell from other threads, I research the snot out of anything/everything before I touch it. Patience and some OCD when it comes to that kinda stuff so, I'd follow the directions to the letter.
My day job is at an appliance repair shop. I plan to grab an old dryer with no heat before it goes to scrap and use it for the tank. Watched a video of someone doing it, not sure if mine would fit, but, poured in the cleaning and prep stuff with a chain, sealed it up, wrapped it in foam/blankets to prevent denting and let it tumble. Definitely a good way to make sure it's cleaned out and prepped.
Different video, but seems like a few people are doing that... but since I just put new wheels, idler, belt etc into my machine, I'll wait for a scrap one to come in.