You might want to post a thread on the single item you want to tackle, get some feedback. Some of these folks have been doing this stuff since before politicians were crooked :-)
"Awl Grip paint
- What went wrong?" and post a picture. Someone (or several someones) will be able to give you some pretty good information on what might have gone wrong and how to fix.
"Best adhesive for reflex insulation" there is bound to be people more than happy to provide information based on experience. If you mention 3M spray adhesive in the post you may find you want a different type or some tips. Or that will never work because... and you need to use x.
Even if it does not undo what is done it will provide you with the knowledge that makes a painful setback into a valuable learning experience.
For example when you mention paint formed "blisters and started to fall
off in a few days" my first thought was moisture. Something kept the paint from sticking. Once paint dried enough it forms a skin and seals but is not stuck onto the surface, the normal process of day heat causes the trapped moisture or paint to give off gases or vapor, the paint is still flexible enough to expand like a ballon being blown up by that vapor. Other culprits could be wax or polish residue, or left over cleaning solution.
When it comes to painting
, glueing, or welding cleanliness is really next to godliness. And prep work is 90% of the work. Don't ask how I learned this. Or how many times it took for the lesson to "stick".