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Wet blasted casings

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Laverda Dave:
I had my castings vapour blasted for the same reason, i couldn't clean them up even by soaking in paraffin and when that failed, using a dishwasher tablet in boiling hot water for a couple of days (someone told me it would work....!).
After I got the blasted cases back I cleaned them three times   with gunk and boiling hot water and then a final 80psi air blast.

Trigger:
The problems I face with getting a 40+ year old engine clean is a long process, some painted and some just fir balls of corrosion. First the engines go into a jet steam cleaner to remove all the years of dirt, then they sit in acid for two days (the acid will remove any oil that is soaked in to the alloy, this can be a problem later as it will lift the paint once heated). Then they go into a hot wash and left to dry off, into a oven at 200c (just to check that there is no oil still in the cases) then soda blasted to remove any corrosion, hand finished and all oil ways blasted and checked.
Painted with 2-3 coats of VHT paint, left for two days to dry before being cured in a oven.

Laverda Dave:
Lovely finish there Trigger.
My next project after 'project 400' is the restoration of my Rickman CR750 and it's festering engine. I'll try your method to clean it up.
Dave

AshimotoK0:

--- Quote from: Laverda120 on August 16, 2016, 01:37:08 PM ---Lovely finish there Trigger.
My next project after 'project 400' is the restoration of my Rickman CR750 and it's festering engine. I'll try your method to clean it up.
Dave

--- End quote ---

Yes lovely finish .. were the cases off a Russian Import ;D

Trigger:

--- Quote from: AshimotoK0 on August 16, 2016, 01:46:47 PM ---
--- Quote from: Laverda120 on August 16, 2016, 01:37:08 PM ---Lovely finish there Trigger.
My next project after 'project 400' is the restoration of my Rickman CR750 and it's festering engine. I'll try your method to clean it up.
Dave

--- End quote ---

Yes lovely finish .. were the cases off a Russian Import ;D

--- End quote ---

I did have one in once, painted in bright yellow >:( >:(

Dave this sort of case cleaning is done on a industrial level. It costs £2000 to fill the tank with acid and £375 to get rid of the old waste.

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