Team Chevelle banner
Cancel
Create thread New Garage Forums

"Gummy" paint??

Jump to Latest
1 - 12 of 12 Posts

dpvoiceguy

· Premium Member
Joined
·
1,374 Posts
Discussion starter · #1 ·
So here's a question from a bodywork newbie. I decided this past summer that since I'll never win the lottery, I will teach myself to do bodywork and paint. :)
Anyway...I've been stripping paint using a scotchbrite 29900 clean and strip disc. It works extremely well in getting down to bare metal and conditioning the metal at the same time. My car was originally Placer Gold (I find areas of it hiding under there as I progress), but it was repainted in the 80s/early 90s by the previous owner. I've never done this before so I have no basis of comparison, but many areas turn "gummy" as I start to strip them...the best I can compare to is almost like melting crayons! I took a photo of it yesterday because it's so odd to me.
It's just a curiosity thing because I just powered through it and got the fender down to bare metal. Any thoughts from those with experience...what am I removing? Single stage? Enamel? Lacquer? Or is this just typical of the products of that era?
 

Attachments

Save
Reply Quote Like Like
#2 ·
Using a grinder or a DA sander? Would it be because the grinder spins at higher RPM which will cause the old paint, and the metal it’s on, to heat up and melt the paint especially if it’s laid on thick? Or just crappy paint. 🤷‍♂️
 
Discussion starter · #5 ·
Interesting. Thanks guys as always for the knowledge base here on TC!

Super excited that I've got about 90% of that old nasty paint gone!

Btw...it also smelled kinda nasty while removing it. It smelled "old"! That's the best way I can describe it. I've refinished a couple of old furniture items and they smelled the same. I always associated it with old wood, or perhaps the fact that my grandfather was a chain smoker, but now it's got me thinking...
 
#6 ·
:D The smell of it is also unique. You've done well knocking it off. When heavy coats of lacquer primer are involved, now that can be awful to sand or grind. Lacquer and some cheap enamels will rub off with thinner. Thats the definition of lacquer though... anything that "re-wets" with solvent is a lacquer.
 
#7 ·
drivejunk said:
:D The smell of it is also unique. You've done well knocking it off. When heavy coats of lacquer primer are involved, now that can be awful to sand or grind. Lacquer and some cheap enamels will rub off with thinner. Thats the definition of lacquer though... anything that "re-wets" with solvent is a lacquer.
Click to expand...
no it is not the definition of lacquer. Alkyd enamels, acrylic enamels and many other products will re-wet if a hardener is not used. Any conventional 1K will re-wet. Lacquer is a 1K but there are many 1K products that are not lacquer.
 
#12 ·
Me either. The thread purpose didn't seem to call for fullblown technical correctness. DP90LF also rubs off with thinner. Uncatalyzed enamels can too. The term thinner covers a lot of products.

The definition of lacquer, in my understanding, is a product that can be completely reversed by solvent alone.

Opinion or fact, thats my take.
 
1 - 12 of 12 Posts
About this Discussion
11 Replies
5 Participants
Last post:
drivejunk
Team Chevelle
posts
5.3M
members
131K
Since
1998
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
Bench Racing Performance Engine Chevelle Tech Body Shop