Will vapour blasting wreck my silent blocks?

I have the dirtiest engine ever filled with brown sludge & runny liquid which might have been water. I like a clean base to rebuild it but am not fancying my chances of getting the silent blocks out & back in, they look ok & apparently new ones are not available.
I'd like to get the engine vapour blasted & the firms blurb states it's a 'gentle' process so can see that steam / water vapour should not cause damage to the empty engine but does anyone know what could happen to my silent blocks please?
Thanks
Mike
I'd like to get the engine vapour blasted & the firms blurb states it's a 'gentle' process so can see that steam / water vapour should not cause damage to the empty engine but does anyone know what could happen to my silent blocks please?
Thanks
Mike