Engine Rebuild ??s

So I had a few questions specific to a marine motor rebuild.

Sandblast/ Paint:
- There a a few parts that the original coating has peeled off somewhat with a little rust that I would like to rehab before I reinstall. Specifically the: theromstat housing, a coulple brackets, and the exhaust manifolds...
- is it safe to have any or all of those sandblasted?
- I checked the manifolds for leaks and couldn't get any bubbles so I think they are good but they have some surface rust where the manifold bolts to the head.
- What kind of Paint or Coating should I use? I've used POr-15 on my ranch truck that stays muddy and neglected and it has held up great. Will that work well in a marine environment?

Cleaning Fuel System Parts:
- The main rubber fuel lines that don't have fittings are being replaced as fuel line was cheap enough by the foot I didn't see a reason not to. However, I wonder about the: Fuel Rails, Lines from the FCC to the rails, and is evidenced by my replies in the fuel injector thread the injectors themselves.
- Is there a good way to clean the lines?
- Good way to clean the throttle body?
- On the injectors I have looked at the Ford Motorsport replacements but they look longer/taller than what is in there originally.
- What about sending the injectors off to be rebuilt?


Thanks for any and all help!
Trey

San blasting is OK on those parts. Dress gasket areas with a a flat bastard wrapped in emery cloth.
Fuel line shall be A-1 rated. Not autozone crap.
Throttle body cleaning I really like Amsoil Power Foam. OMC Power Tune is a close second.
Internal fuel parts I use Seafoam to clean with but the Power Foam will work there too.

Fuel Line is good stuff.. Not from Autozone.
I'll look into the cleaning stuff suggested.

Use muratic acid for the internals on the manifolds to get all the rust out. Time it for probably no more than 3 to 5 minutes and then flush it out.

Electrolysis works great for the rust removal. No chemicals buy does take.some soaking time in the tank.

The water flows into the open ports and works no different than on the out side. I have found that if you have a build up of calcification on the inside it doesn't seem to work well on that. Chemicals for the will with that issue unless someone else knows a way.

I was more specifically addressing his original question. -- "There is a few parts that the original coating has peeled off somewhat with a little rust that I would like to rehab before I reinstall. Specifically the: theromstat housing, a couple brackets, and the exhaust manifolds."

The electolysis works great on the parts he has listed. Especially in reference to the original coating has peeled off. You would get very good line of site and I have found on small parts like the upper thermostat housing that line of site is not critical. The process cleaned an old one I had laying around that was unusable to something that is now rust free and maybe usable.