plenum polishing
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Safety Car
Joined: Mar 2005
Posts: 4,489
Likes: 1,241
From: Fredonia WI
2025 Corvette of the Year Finalist - Unmodified
2024 C7 of the Year Winner - Unmodified
2023 C4 of the Year Finalist- Modified
2020 C4 of the Year Finalist - Modified
2019 C4 of Year Finalist (performance mods)
2018 C4 of Year Finalist
x3 ... share your secrets
Thread Starter
Intermediate
Joined: Feb 2017
Posts: 38
Likes: 4
I use a 12volt battery charger , salt and vinegar , and round cotton pads , sticker (corvette logo) and adhesive plotter paper
I cleaned the plenum and put the sticker on , now i put the cotton pad in the mix of the salt and vinergar . Connect the positive wire from the charger on the plenum put the wet cotton pad on the plenum sticker , i take the negative wire and put it on the wet cotton pad for a 20 seconds and look if it‘s deep enough . I repeat this till it‘s fine to me . i cleaned the plenum again and put the foil on and cut out the flames and do the process over again . Now clean and pollish .
I‘m from the Netherlands . I’m working on improving my English .
I cleaned the plenum and put the sticker on , now i put the cotton pad in the mix of the salt and vinergar . Connect the positive wire from the charger on the plenum put the wet cotton pad on the plenum sticker , i take the negative wire and put it on the wet cotton pad for a 20 seconds and look if it‘s deep enough . I repeat this till it‘s fine to me . i cleaned the plenum again and put the foil on and cut out the flames and do the process over again . Now clean and pollish .
I‘m from the Netherlands . I’m working on improving my English .
Safety Car
Joined: Mar 2005
Posts: 4,489
Likes: 1,241
From: Fredonia WI
2025 Corvette of the Year Finalist - Unmodified
2024 C7 of the Year Winner - Unmodified
2023 C4 of the Year Finalist- Modified
2020 C4 of the Year Finalist - Modified
2019 C4 of Year Finalist (performance mods)
2018 C4 of Year Finalist
Wow, amazing work. 
Safety Car
Joined: Mar 2014
Posts: 3,558
Likes: 548
From: Round Rock Texas
I use a 12volt battery charger , salt and vinegar , and round cotton pads , sticker (corvette logo) and adhesive plotter paper
I cleaned the plenum and put the sticker on , now i put the cotton pad in the mix of the salt and vinergar . Connect the positive wire from the charger on the plenum put the wet cotton pad on the plenum sticker , i take the negative wire and put it on the wet cotton pad for a 20 seconds and look if it‘s deep enough . I repeat this till it‘s fine to me . i cleaned the plenum again and put the foil on and cut out the flames and do the process over again . Now clean and pollish .
I‘m from the Netherlands . I’m working on improving my English .
I cleaned the plenum and put the sticker on , now i put the cotton pad in the mix of the salt and vinergar . Connect the positive wire from the charger on the plenum put the wet cotton pad on the plenum sticker , i take the negative wire and put it on the wet cotton pad for a 20 seconds and look if it‘s deep enough . I repeat this till it‘s fine to me . i cleaned the plenum again and put the foil on and cut out the flames and do the process over again . Now clean and pollish .
I‘m from the Netherlands . I’m working on improving my English .
PS...your English is better than many of us “English first language” folks!
Race Director
Joined: Apr 2007
Posts: 19,842
Likes: 523
From: Ideals are peaceful...History is violent...St.Charles, MO.
2020 Corvette of the Year Finalist (appearance mods)
C5 of Year Winner (appearance mods) 2019
St. Jude Donor '08-'09-'12 thru'22
The plenum may be porous but, certainly with the work of art you created out of it, who cares?? Beautiful work dutch, nicely done!!