Sorry, no pictures for this update. I neutralized the acid and washed the entire plenum followed up by wire wheel which removed the converted iron down to grey steel for probably 90% of the plenum. The stubbord 10% remaining had rust under the converted iron phosphate.
Decided to whip out my lil sand blaster to cleanup the remaining rust but suprise suprise, my cheapo harbor frieght blaster has a hose that has completely degraded and fell apart after just one year.
Instead of knocking my head against the wall, i reapplied phosphoric acid and will order a “real” hose for my little blaster and go on vacation for a week.
Did i mention that trying to purchase Master Coat silver encapsulator paint has been an epic fail. I’m on the list to be notified when their product comes back in stock. I received an email and went to try to purchase within an hour and they were out of stock again. Heck of a way to run a business. I call these kinds of businesses hobby businesses, cus they don’t exist to make $$.
I emailed eastwood and asked about their encapsulator platinum only to get the same response as they give about the epoxy primers. You must get all traces of acid and acid byproducts removed and fully neutralized to ensure adhesion. I’m real close to giving up on paint sealers and going with lanolin products.
