Thanks everyone for your input.

Just for clarity, when I say I want to Vapour Blast my cases, I mean, I want to pay a professional to do it, not DIY.

Of course, I will clean the casings of all oil and paint before sending them off. Casings only no parts left attached.

The bushings need to come out and new ones put in as some have seen better days and if I don't want issues after restoration, the best is replace everything... bearings and bushings.

I have sourced a company to vapour blast for me and will start ordering bushings and bearings first, before I start removing them before sending off for blasting.

That bush with the punch marks around it will probably be a bad fit into its housing...It may be you'll need a custom bush for that one to get the fit right...I'd get it out and determine what's going on before ordering a standard replacement for it...Ian

email (option): ian@wright52.plus.com

The cam followers should be removed also. Often not easy! Ron

email (option): ronpier@talk21.com

Anything like a bush or a bearing that I would be replacing, I'd leave in place to protect the housing. Blast finishing can make them oversize.

email (option): pes.sales@btconnect.com

With the correct grade and type of media and the right operating pressures components are dimensionally unaffected and threads, bearing housings etc. are not damaged...Obviously an unsuitable, coarse media applied at high pressures could detrimentally affect surface finish and dimensions..We've all heard the stories of castings that end up looking like they've been shot peened...However, a suitable media for blasting rusted iron barrels for example wouldn't be selected for aluminium components...

For some items a two stage method would be used...It's a common misconception that in all cases blasting is an aggressive method of surface finishing when in fact glass, plastics and many other materials can be treated in this way without damage to the surfaces...Ian

email (option): ian@wright52.plus.com