to seam seal and under coat or not Options

[mrbubblehead]

it would be nice if we had a paint and body forum in our beloved 914world to ask these kind of questions ...

i have spent months and months scraping seam sealer and under coating and sand blasting rust and alot of welding. i then put a coat of rustolium primer to temporarily protect the bare steel until all of my metal work is finished. then plan to blast off the rustolium one section at a time and shoot an epoxy primer over the bare steel.

now my question to you paint and body gurus. is it necessary to re-seam seal the seams?

it was such a pain staking task removing every spec of seam sealer (at times with a dental pick) i hate to apply anything that caused so much rust in the first place. im glad i took the time to strip the original sealer out of there. because even though it looked in tact and in good condition i would find rust underneath it. now im sure it will be rust free.

if i do need to reaply the seam sealer, when do i do it? to the bare blasted metal? after the epoxy primer? what type of seam sealer should i use? i really dont want to have to buy the special wurth gun. the original sealer look is of no concern to me.

as far as undercoating, if it is necessary i thought about taking the tub dowm to have the bottom and fender wells rhino lined but i hate adding any unnecessary weight.

this car will be driven alot if not daily except for rainy days.

any thoughts

tia

[CptTripps]

FWIW, here's how I did the interior of my 73. I imagine it would work well for the undercarriage too.

I used rattle-can etching primer, then seam sealer, then Herculiner, then 2k primer, then paint.

The Herculiner went on a lot thinner than typical "RhinoLiner" and was only $60 a gallon at the time. The pail weighed about 7lb full, so to doesn't really add that much weight to the car.

If I had to do it over again, I'd skip the seam sealer and just cake the Herculiner in there. Others may disagree with this though.

Here's a few pics of the process I used. Again, I might skip the seam-sealer next time. Although, it's encased in 3 coats of rubber Herculiner, and primer, and paint...so maybe it'd be ok.