Off topic, but Mutt, how do you cleanse your parkerizeing solution?
Pure HCL or Muriatic? per phosphate?
I usually strain the sediment with a paint strainer until I need to start fresh.
Thanks,
Dave
Mutt wrote:Mike wrote:My cop buddies at local DMV shop tell me they have chemicals that will bring out original numbers... save for those that have been significantly heated. Mike
Here is the abstract report on bringing back old numbers using reagents
A study has been made of the characteristics of restoration of obliterated engraved marks on aluminium surfaces by etching technique. By etching different reagents on 0.61 mm (.024") thick sheets of aluminium (99 wt%) on which some engraved marks had been erased to different depths it was found that the reagent 60% hydrochloric acid and 40% sodium hydroxide on alternate swabbing on the surfaces was found to be the most sensitive one for these metal surfaces. This reagent was able to restore marks in the above plates erased down to 0.04 mm (.0015" or 1½ thou) below the bottom of the engraving. The marks also presented excellent contrast with the background. This reagent was further experimented with similar aluminium surfaces, but of relatively greater thickness of 1.5 mm (059"). It was noticed that the recovery depth increased slightly to 0.06 mm (.002"); this suggested the dependence of recovery depth on the thickness of the sheet metal. Further, the depth of restoration decreased in cases where the original number was erased and over which a new number was engraved; the latter results are similar to those of steel surfaces reported earlier [M.A.M. Zaili, R. Kuppuswamy, H. Harun, Restoration of engraved marks on steel surfaces by etching technique, Forensic Sci. Int. 171 (2007) 27–32].
strong56KH wrote:Change out the bolts holding your cylinders down to studs. Looks like there is paint or something applied over the vin number and on the case surface to the left, but hard to tell.
Return to General K / Sportster Discussions
Users browsing this forum: No registered users and 16 guests