An observation on paint removal.
 

I have been bead blasting the painted parts off of my O and have found that the cast iron front nose is very hard to get the paint off. I believe it is the cast iron itself being porous that holds the old paint in place. Also I found it was primed a rust red where the steel parts were not. I believe they primed the cast iron to be able to smooth the surface for a smoother final finish to the paint.

Anyone else noticed this?

John

When I blasted my original grille the ain't came off fairly easy. But I also used aircraft remover to get most of it off and what it didn't take off I blasted but my entire originLs base layer was a red primer also mine was pretty flakey. Maybe your paint was just in better shape then mine I don't know. But using the stripper sped up the process by a lot

I was using Aircraft stripper also. The grill was tedious to say the least. Only used the stripper on the nose. Maybe the blaster was taking off the primer with the paint on the other pieces and didn't notice it.

I would venture to say this is what is under the paint....


http://i176.photobucket.com/albums/w...b.jpg~original

I was sand blasting a few parts of my 122 just yesterday and I used the black sand for the cast iron it seemed to work better than the $4 stuff but I used the $4 stuff for the sheet metal and it did the job on the paint easily thr rust took a little bit more.

they used red oxide primer on cast parts like tranny cases to seal the sand in so it would not get inside the cases and it prolly was just as easy to do all cast so it did not rust when in storage

I was using glass beads. That is what my friend uses in it. He has a sand blaster but it is easier to use the glass bead blaster.

Used Black Diamond blasting sand on my 100, came right off.

I blasted all my snowblower parts with silicon carbide media. It's just what we use at work. I have yet to see this media and 90 PSI have trouble stripping anything.

I forgot to kention I also use the black diamond media while blasting. Coukd be another reason I didn't have any issues