Is all naphtha the same?

My husband and I bought a gorgeous old 1926 house that needs a lot of work. My first project has been stripping paint (while he tackles bigger stuff.) I quickly discovered some amazing wood underneath a dozen or so layers of paint -- but the molding is annoyingly difficult to scrape. I'm using Citrus Strip (I think that's the brand name) and it's brilliant at getting the paint loose, but are there any tools designed to get around all the odd shapes/curves of crown molding? No one at the hardware store has been able to suggest anything. ~Helen

Hello all, I just repainted my living room and had no issues. In the dining room I just finished painting the ceiling with one coat primer and two coats and noticed some bubbling after applying the paint. When I poked the bubbles with my fingernail it appeared the previously painted surface bubbled. I did not see any bubbles after the primer was applied. After sanding I cleaned the dust using a damp sponge. I sanded the bubbled spots (bubbles formed in a half dozen locations). I applied another coat of paint and noticed some bubbles form in some places again. After the paint dried a day I scraped the bubble and tried applying joint compound. [B]When I applied joint compound the whole layer of paint around where I applied the joint compound loosened up and I was able to scrape it off the ceiling.[/B] A couple of pictures are attached. I didn't get to paint the dining room ceiling until a month after primer was applied. A day or two passed in between paint coats on the ceiling. Overall the ceiling looks great but I have to fix these spots. Any idea on whats going on? Products used: Spackle - Sheetrock green/blue top joint compound Primer - Sherwin Williams Harmony Paint Ceiling - Sherwin Williams Harmony Flat Paint Walls - Sherwin Williams Duration Matte Conditions: Indoor temperature between 60-70 degrees F Indoor humidity in the 20%-25% range Heating type - Baseboard radiant