I own a lovely 1968 Airstream
I'm about to seal up the interior of my trailer with Trim-Pro 635. I was wondering if I need to clean off the old Trim-Pro before applying a new application? When the subfloor was removed, we pressure washed the walls a few times. Although we still see a lot of old Trim-pro left behind. I started soaking the walls with mineral spirits and scraping away. To discover that it was a challenge to remove this stuff. I have started to come up with a new plan.
I think that it might be a good idea to scrape the seams and rivet areas places that will be important to apply the new Trim-pro. Or does it even matter? Also, if it is necessary to remove the old stuff, then does anyone have some advice on things that have worked? Even with the mineral spirits, my scraping is aggressive. Below I have included a few images to reference. Along with an example of a section that is already scraped away.
Thanks so much!