Andy_K 

I'm still kind of experimenting with that. This is the third frame I've used it on, and I'm doing less each time. This time as an experiment I scuffed the top tube up quickly with some coarse sandpaper, but didn't touch the down tube or head tube. As you can see, the sanding wasn't necessary in this case. I have a theory that there is some correlation between how well the paint bonded to the frame and how much prep is needed. On my 1973 Nishiki, the paint on the frame softened but didn't blister like this, but on the fork it blistered easily. This stuff takes paint off of chrome like it wasn't even stuck on there to begin with.

For the second picture earlier I just wiped it off with a shop rag -- nothing abrasive. I put on a second coat this morning and got most of the places I missed last night. After wiping with shop rags again, I went over it with a dry Scrub Daddy sponge, and that took most of what was left.


I discovered tonight one embarrassing thing tonight. The paint on the drive side chain stay just wasn't coming off at all -- not even a bubble. Then I scraped at it a bit with a plastic putty knife and that didn't scratch it. Can you guess why? Yeah, there was a clear stick-on chain stay protector. You can even see it in one of the pictures I posted yesterday. I didn't notice it.

When it's nearly done I'll use a wire brush on a Dremel tool to clean up the tight spots and anything else that's still there. It looks like I'm only going to need to sand to get rid of the rust and prep the surface for primer.