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Vapour Blasting/Engine Re-finishing

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Raygun:
Getting deep into my engine teardown now on two CB550 engines and rebuild so getting to the stage where I am thinking about what route to refinish.

From what I read, vapour blasting seems to be liable to corroding pretty soon after it's done; how do people stop this- applying a clear varnish or other finish?

Also, do the engine casings have to fully disassembled before they can be blasted? Can engines be blasted assembled? I've stripped down the top-end, avoiding doing the bottom end if I can avoid it but would like to refinish the whole engine casing to bring it up to a 'new' look.

Had a quick search in the forum and couldn't find anything; though if this has been covered before my apologies!

Thanks all!
R

royhall:
Don't vapour blast your bottom end without dismantling. It's done with a powerful water jet with and an abrasive media mixed in. Any abrasive getting into your engine will ruin it.

AshimotoK0:
If the 550 is the same as the 500 the top end would be painted silver.
Here is what I did to top end on my CB500K0 to bead blast it to stop bead ingress. The pic was after the 1st' blasting. I then repeated with brand new media and blasted with compressed air line and then washed down with acetone to clean and the blasted again with compressed air. Motley collection of non-standard bolts/threaded rod etc to hold together/seal.

Poo pooed by some on here I know but there ya go.  ;D

Raygun:
Unfortunately the top end on mine has been very badly sprayed black- so I'm erring to removing it and I hoped blasting would do that.

The overspray is hideous, it's in the inlets!

royhall:
How would you clean out an assembled bottom end with acetone? Don't try it you will ruin the engine, the only way to do it safely is to take it apart.

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