rcx132
Philip
- Messages
- 2,705
- Location
- London, UK
Finally finished getting the underseal off, I think it must have totalled to two days work. The flat bits were easy, but getting it out of all the nooks and crannies was slow. At the end I discovered that a blow torch works way better than a heat gun.
I put a lot of effort into getting the underseal out the corners and crevices so that the sand blaster can get in there afterwards. I'm thinking these are the most important areas because it's where the rust starts. In the areas where my scraper couldn't reach I used a dental scraper. And where that couldn't reach I just held the blow torch until the underseal turned to char. There's still char left in there but the sand blaster will get that off.
I've only got two serious rust areas, so I cut the metal out. I showed my bro who told me off for cutting square corners, told me to always cut rounded corners. I doubt it makes much difference when welding butt repairs. But it is actually easier to drill the corners so the next bit I cut out using a drill in the corners.
Next to get back to shiney metal where I'm going to weld. I tried making citric acid gel - failed to get that to work. So I tried my new pressure pot blaster, result! Never used one before, it's really effective.
upload png
I put a lot of effort into getting the underseal out the corners and crevices so that the sand blaster can get in there afterwards. I'm thinking these are the most important areas because it's where the rust starts. In the areas where my scraper couldn't reach I used a dental scraper. And where that couldn't reach I just held the blow torch until the underseal turned to char. There's still char left in there but the sand blaster will get that off.
I've only got two serious rust areas, so I cut the metal out. I showed my bro who told me off for cutting square corners, told me to always cut rounded corners. I doubt it makes much difference when welding butt repairs. But it is actually easier to drill the corners so the next bit I cut out using a drill in the corners.
Next to get back to shiney metal where I'm going to weld. I tried making citric acid gel - failed to get that to work. So I tried my new pressure pot blaster, result! Never used one before, it's really effective.
upload png