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**HO455** · 09-15-2023, 11:52 PM

I used Ospho on the interior panel and the inlet adapter piece. Unfortunately Ospho comes with poor instructions so it should always be used as per these directions from SPI.

http://www.spiuserforum.com/index.ph...ze-ospho.3973/

Photo shows the pieces after 24 hours and before replying Ospho and rinsing.

I also prepared the area on the cowl by using a Dremel to grind the rust pockets out. One favorable thing here is the rust pitting is from the engine side of the firewall. I inspected the back side with a mirror and there is only light surface rust there.

09-15-2023, 11:52 PM	#1021
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 10,886	Re: Working Man's Burbon I used Ospho on the interior panel and the inlet adapter piece. Unfortunately Ospho comes with poor instructions so it should always be used as per these directions from SPI. http://www.spiuserforum.com/index.ph...ze-ospho.3973/ Photo shows the pieces after 24 hours and before replying Ospho and rinsing. I also prepared the area on the cowl by using a Dremel to grind the rust pockets out. One favorable thing here is the rust pitting is from the engine side of the firewall. I inspected the back side with a mirror and there is only light surface rust there. Attached Images __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377