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Blocking/primer advise

#1
I'm kind of at a crossroad with my box sides and want some opinions.

I have the following on the panel, epoxy, then filler in any needed areas, epoxy over everything again. 2 coats of feather fill, blocked out with 120 and 180. 1 coat epoxy, then 2 coats of regular build blocked with 180.

Here is where I'm going back and forth. I have everything looking pretty good, blocked flat, but in a couple spots I'm down to my 1 coat of epoxy that was right before the 2k, and in 1 spot just hazing through the epoxy to feather fill. I have some 320 to do and end with 400 on a hand pad before epoxy sealer reduced around 25 percent.

Will it be ok to break through a little more to the feather fill and seal over that? Or should I add another coat of 2k or epoxy before 320?
 

Slofut

Active Member
#2
Started to reply but not being there to see it first hand I chickened out. Maybe spot seal a couple coats on the feather fill and let dry before sealing overall. Idk though, you won't know 'til you get there. Best hear from others...

Btw... I just finished another 6hrs today doing nothing but sanding a fender and hood with a long block, well there were some areas underneath that needed work. But mostly just been hand sanding.
 

texasking

Active Member
#3
The truck I just finished had some spots where I sanded through the Turbo 2K to the epoxy. Some of the spots looked like they might leave a "ring" but I went ahead and sealed it with epoxy reduced 25% and they went away. For your own piece of mind another coat of epoxy or 2K sure wouldn't hurt, especially since your sanding some more.
 
#4
I would finish sanding with your 320 and then shoot another coat of 2k, guide coat and wet sand with 600 until the guide coat is gone.
Prep and spray 1 coat of reduced epoxy as a sealer. Give a final inspection before proceeding.
 
#5
Thanks for the insight guys, you confirmed what I probably knew needed to be done. I just wanted to get by without doing it, sometimes you just need to hear it from someone else to be convinced.
 
#7
I have a couple of thoughts. If you think you have low spots that are significant enough to need 2 more coats of polyester. I would not continue to sand with 320. 320 is not going to do much leveling. I would cut the whole panel with 180-220 back with guide coat. Then you can shoot your polyester over the whole panel and final block with 180 and then 220 or similar. Once you have your panel straight finish with 2 coats of epoxy and final block with your 320.

The reason I say this is first. If you are blocking different materials, they will sand differently and it will be very difficult to keep it straight. Secondly, It seems to me, you might be getting quite a bit of build on the panel. Finally, the 2 coats of epoxy will protect you from any random sand scratches showing through and provide the best possible foundation for your base.

Good luch,

John
 
#8
I have a couple of thoughts. If you think you have low spots that are significant enough to need 2 more coats of polyester. I would not continue to sand with 320. 320 is not going to do much leveling. I would cut the whole panel with 180-220 back with guide coat. Then you can shoot your polyester over the whole panel and final block with 180 and then 220 or similar. Once you have your panel straight finish with 2 coats of epoxy and final block with your 320.

The reason I say this is first. If you are blocking different materials, they will sand differently and it will be very difficult to keep it straight. Secondly, It seems to me, you might be getting quite a bit of build on the panel. Finally, the 2 coats of epoxy will protect you from any random sand scratches showing through and provide the best possible foundation for your base.

Good luch,

John
No low spots, just refining scratches before base and running low on material to refine scratches in a couple spots.

Probably going to do as 68 highlighted but use unreduced epoxy instead of 2k. And then onto sealer.
 
#9
I guess I miss-read your origional post and thought you were going to add Featherfill which is polyester. My apologies, and as 68 suggested I would shoot a couple of coats of unreduced epoxy if I was just getting rid of sand scratches. I have really come to love the epoxie's ability to do minor filling.

John
 
#11
Two coats of unreduced epoxy will hide some pretty good sand scratches provided you block it out. Reduced as sealer will cover 320 for a straight non metalic color but most painters will go at least 400-600 for metalics. I personally don't like to go coarser than 400 but since I only paint my own projects these days I don't get into any exotic custom work.

John
 
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