best rust protection ?

[Catamax944]

I brought my car with me from Italy a few months ago and reading about the horror stories of the UK 944's got me thinking. Mine was never rust proofed since in Italy it's not an issue , it does have some minor rust spots but i never checked the sils until today . Fortunatelly the sils are in great shape and i would like to keep them that way . My question to you is how can i clean the inside from the grit and dust and what is the best rust treatment i should use ?
Here are a few pics of the sils

 

[pauljmcnulty]

The guy from Rust Stop Shop was incredibly knowledgable and enthusiastic, that would be my first option.

 

[Diver944]

Now that's what a clean inner sill should look like []

 

[PSH]

what lovely sills you have sir...

Pete

 

[robdimond]

Bilt hamber stuff is generally recommended. Very easy to apply if you get the aerosol with injection lance.
Most people would swap their sills for yours! I would!

 

[Catamax944]

Thanks guys ,i'm glad they are ok and i want to keep them that way.
I read about bilthamber and waxoyl in a few posts here but didn't know which one was better .
Before i aply any rust proofing i want to clean them ,it wont do any good if i spray it over all that muck. Any idea how to clean the inside ?

 

[T3rra]

Them sills are the best Iv seen!
There a rubber bung in the rear wheel arch leading in 2 it from the rear wheel.

You could try air pressure but that MIT just blow it down the other end.
Or you could try a messyer method. Flush the stuff out. Maybe using some old oil or diesal and then some air pressure 2 lift it. Then steam clean. But 2 honest they look so clean I don't think there's much built up off anything in there. U can clearly see the drain holes and the lowest sill eage. Waxoil will just put a water tight barrier over the lot, metal or dust.