undercoating

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   Hi all,
I dropped the fuel tank last weekend to replace the sending unit and clean out the rust inside the tank.  During the process, I noticed every exposed surface under the car has been sprayed with undercoating.  Now that the tank is removed, should I coat the exposed surface with more undercoating?  There is very light surface rust in some places so I'm considering applying Rust-Shield to the area instead.

Additionally, the rear cross member wasn't coated and has surface rust.  what are people using under their cars?  I'm not building an original here (although I believe people in the 70's loved undercoating everything), I do want to stop additional rust.

Curious to know what others have done in the past.  This is a good time for me to do some work under the car while I wait on the sending unit to arrive.

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rjewell Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 14-August-2019 Location: Virginia Status: Offline Points: 15	Post Options Post Reply Quote rjewell Report Post Thanks(0) Quote Reply Topic: undercoating Posted: 30-September-2019 at 5:14AM
	Hi all, I dropped the fuel tank last weekend to replace the sending unit and clean out the rust inside the tank. During the process, I noticed every exposed surface under the car has been sprayed with undercoating. Now that the tank is removed, should I coat the exposed surface with more undercoating? There is very light surface rust in some places so I'm considering applying Rust-Shield to the area instead. Additionally, the rear cross member wasn't coated and has surface rust. what are people using under their cars? I'm not building an original here (although I believe people in the 70's loved undercoating everything), I do want to stop additional rust. Curious to know what others have done in the past. This is a good time for me to do some work under the car while I wait on the sending unit to arrive.

72FordGTS Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group GTS.org Admin Joined: 06-September-2005 Location: Ontario, Canada Status: Offline Points: 5846	Post Options Post Reply Quote 72FordGTS Report Post Thanks(0) Quote Reply Posted: 30-September-2019 at 1:01PM
	If there is rust, even surface rust, I wouldn't put undercoat over top. A rust paint would be a better idea over rust, or mechanically remove the rust then paint and undercoat. Will your car see inclement weather? My car was undercoated when new, and that stuff did preserve the car well. But man, what messy stuff. On my the frame, chassis parts and other undercarriage parts that I have restored, I stripped them to bare metal and either painted or powder coated. I still have undercoat on the floors, and don't plan on removing it. But I also don't plan on adding anymore.
	Vince 1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin

californiajohnny Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609	Post Options Post Reply Quote californiajohnny Report Post Thanks(0) Quote Reply Posted: 30-September-2019 at 7:09PM
	that SEM rust shield is a good choice! i used hurculiner bed liner on my car when i redid it looks similar to undercoating but more durable and clean
	JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION