Wondering if I should paint the inside of the body with POR-15 first and then continue on with the body work patch panels sub-floor etc. Or get all the body patch panels and work done and then apply the POR-15
Wait if you have to screw with it after it's been applied you run the risk of it coming off in sheets. I would finish the patch panels then wirebrush the loose stuff then start slapping the POR on......after you etch it with their metal prep.
/rant on Again with the POR-15... You're making patch panels, so you'll have new metal. POR-15 is not designed for that. POR-15 is for rusty ****, period. If you don't want to clean it up or fix it, then slap POR-15 on it and it will stick and protect it. If you want to coat it and forget it, POR-15 it. If you are fixing it, what the heck is wrong with paint? /rant off I'm sorry, but POR-15 is not some magic unicorn joy juice. Repaired cars and trucks from days gone by are going to see very little of what makes them rusty. Paint has been around for years and it does it's job very well. It protects and beautifies raw metal. While I accept that POR-15 is some tough stuff, paint works at least as well in 90% of the situations. Also it costs less, is easier to store partially used containers, doesn't require special prep and seems easier to apply to me. It also won't come off in sheets if you don't do it just right.
I'm mainly concerned with the inside of the body where its hard to access, like inside the doors , in cracks ans crannies etc. I agree if I can get at it I will sand prime and paint.
I always use it, or Master Series Coatings, on the inside of panels that I repair, and to seal up old ones that have some surface rust. And that's why I use POR, instead of paint, so it gets into places I can't remove rust, nooks, crannies, seams, inaccessible panels. I also use it on undercarriages, mostly over blasted panels. but again. it protects where you can't get to. On underfloors, I shutz on undercoat, or bedliner, while the POR is just tacky, so it sticks. Even if the undercoat gets damaged, the POR can protect themetal under it...esp. cause we know how water gets trapped under undercoat and rusts even faster! I wold definately do it after your repair work, for this reason. Seals up your welds, and protects the new patches. It would burn off (terrible smell, and probably toxic fumes) and begin to peel if you welded on the front side of a PORed panel. And it does stick to new metal, you just need to clean off the oil or whatever contamination is on it, and either lightly scuff it, or metal etch it for it to stick like gangbusters.
Grappler word of advice ,wear long sleeve shirt and gloves,,por 15 doesnt wash off like paint. It wears off in about 2 mos. from skin
Do the METALwork first, then POR it. Its been my experience that the stuff gets everywhere, which is why we like to use it. But you dont want that underneath anything you are going to make look nice. Chances are your going to get some on the outside of the body as well and it will need to be scrubbed off. Finish your metal, the POR, then bodywork.
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