Hi Mark & Tim,
I'd *not* recommend POR-15 or similar for inside frames, except for
those easily accessible areas where you see and check for thorough coverage and
that it doesn't run into draingage holes, drip on your driveway or arm, or get
in your hair! It would block imporant drainage and ventilation holes, given a
chance. It will likely outlast a concrete driveaway. And there is no way to get
it off your arm once it dries, you lliterally have to wait for it to wear off
skin, approx. two weeks, or have to cut your hair to get it out (don't ask me
how I know) .
Instead I'd suggest treating the inside of frames with Waxoyl or similar
product. These are "injected" through access holes, may need to drill some,
with a pressure gun. The mist created settles on all surfaces and prevents
further rusting. It should be retreated every year or two or three, depending
upon
your climate and how much the car is out and about.
Feel free to blast around with some compressed air to chase dirt and
loose scale out of the frame first. Also, seal any new access holes with 1/2"
plastic plugs that often come with "kits" for this purpose.
Waxoyl is a lot like the sprays manufacturers use on cars to protect
during shipment, might be removed at the dealership before final delivery. I
recently disassembled the parking brake on my TR4 and found it solidly caked
with
the 40 year old waxy stuff, which also serves to give some lubrication to
moving parts like these. It did the job, there was no rust underneath. Found
it
on the differential and in some other nooks and crannies, too.
Some internal places I used POR-15 on my frame were the open-ended cross
tubes and outrigger tubes. To do so I put a foam sponge on a length of wire,
dipped it in POR-15 and pushed it through several times. I also used a sponge
type "brush" to coat the open front ends found on TR4 main frame rails. But,
these were places I could easily see the results and didn't have to worry about
drainage holes.
Wear gloves and long sleeves when working with the stuff!
Alan Myers
San Jose, Calif.
'62 TR4 CT17602L
Can I spray it into the drainage holes in my frame? I scrubbed down and
painted my frame on the outside during the rebuilt, but I never did the
inside. Bitterly regretting that now. I have some loose flakes in there and
wondering what's happening. Thinking blasting out the frame with compressed
air then POR with a spray bottle would help stave off future rusting. What
think the massed minds?
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