Author Topic: Painting new stripes on old paint. Prep?  (Read 1307 times)

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Offline cougar

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Painting new stripes on old paint. Prep?
« on: April 21, 2015, 07:30:02 PM »
Hey folks. I recently got a "94 Ranger with original paint (white). I don't mind the color, I just want to break it up a little. So I have decided to add some striping. I'm somewhat versed in painting (spray-bombing). Actually fairly good at it, but that's starting from bare metal. Adding new paint on top of old paint I'm not familiar with.
Questions as follows;
1. What to clean it with to remove any old wax/polishes ?
2. After a thorough cleaning, Would the next step be masking off the areas to be striped (Not Pin Striping) ?
3. I was thinking next would be to scuff the area to be painted.
4. Lightly tack cloth area and paint.

BTW I don't plan on clear coating.

This is just what I've got in mind as the process. Any tips, changes or other helpful  suggestions are appreciated. Thanks in advance !

   ...cougar...
I'm not prejudice, I'll weld anything that pays! Knowledge that is shared is Never Lost!!   Right is right, wrong is wrong! The truth is the truth and a lie is a lie! DEAL WITH IT ACCORDINGLY !!!   I HATE "DIAL-UP"

Offline eigenvector

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Re: Painting new stripes on old paint. Prep?
« Reply #1 on: April 21, 2015, 09:03:14 PM »
I was going to advise something, but on second thought it would have violated your first condition - painting over the top of the existing paint.
Rob
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Offline faux fiddy

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Re: Painting new stripes on old paint. Prep?
« Reply #2 on: April 22, 2015, 10:12:29 PM »
I had some some stuff that's specially made for pre prep, but I don't know if I really liked it. It was almost like deisel or something, seems like it left an oily residue, but tha tis what it was made for. It certainly didn't dry as fast as alcohol or acetone.

I think a stock factory paint would probably wipe pretty clean with acetone, or Alcohol. Rattle can paint might run with acetone cleaning, especially if it was relatively fresh.
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Offline Retro Rocket

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Re: Painting new stripes on old paint. Prep?
« Reply #3 on: April 23, 2015, 04:55:57 AM »
Stock paint or aftermarket will be eaten by Acetone. Diesel-type liquids will leave behind an oily residue that will prevent paint from adhering. Denatured Alcohol, while it does not evaporate as quickly Acetone or Laquer a Thinner, will clean and degrease paint.

Please stay away from the acetone if you don't want to damage the surrounding paint. They make degreaser solvents and base coat tack clothes for painting, prepping, and cleaning between coats. Best to use these while spraying.

Why not just use prep wash or prepsol, thats what the experts use and its readily available... ;)
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Offline eigenvector

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Re: Painting new stripes on old paint. Prep?
« Reply #4 on: April 23, 2015, 05:47:21 PM »
Stock paint or aftermarket will be eaten by Acetone. Diesel-type liquids will leave behind an oily residue that will prevent paint from adhering. Denatured Alcohol, while it does not evaporate as quickly Acetone or Laquer a Thinner, will clean and degrease paint.

Please stay away from the acetone if you don't want to damage the surrounding paint. They make degreaser solvents and base coat tack clothes for painting, prepping, and cleaning between coats. Best to use these while spraying.

That was actually why I took back my original post.  Every touch up paint can sold over the counter recommends lacquer thinner - but that will eat the paint off.
Rob
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2018 HD Softail Heritage
1979 CB750K Limited Edition
1977 CB550K
1984 CB700SC Nighthawk
1983 VF750S Sabre

Offline Retro Rocket

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Re: Painting new stripes on old paint. Prep?
« Reply #5 on: April 23, 2015, 06:27:53 PM »
Stock paint or aftermarket will be eaten by Acetone. Diesel-type liquids will leave behind an oily residue that will prevent paint from adhering. Denatured Alcohol, while it does not evaporate as quickly Acetone or Laquer a Thinner, will clean and degrease paint.

Please stay away from the acetone if you don't want to damage the surrounding paint. They make degreaser solvents and base coat tack clothes for painting, prepping, and cleaning between coats. Best to use these while spraying.

That was actually why I took back my original post.  Every touch up paint can sold over the counter recommends lacquer thinner - but that will eat the paint off.

I certainly wouldn't be taking advice from a can..!!  Talk to a painter... ;)
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Offline cougar

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Re: Painting new stripes on old paint. Prep?
« Reply #6 on: April 23, 2015, 08:39:48 PM »
calj737; I did a search for "denatured alcohol" (just to be sure) and "Klean-Strip" came up. Probably be able to get that at the local "Lowes" Would that be proper ?  Any particular type clear coat? I'm understanding that mixing to different types isn't good. While although I haven't priced any vinyl I'm wanting to do large check marks. 1 on each side short arm up around the door/front fender seam with the long arm going toward the top/rear of the bed and a double check crossing on the hood (total of 4). Got it pictured in my head (might look like crap on the truck, LOL) !

Retro Rocket; Are the 2 products you mentioned "prep wash or prepsol" the name of the product themselves or just general types ?

eigenvector; LOL, that was one of my reasons (destroying any paint) for coming here to "SOHC4" ! Even I don't post much, I read a lot and there is a Very diverse knowledge base here !

Thanks for your thoughts and suggestions so far !

   ...cougar...
I'm not prejudice, I'll weld anything that pays! Knowledge that is shared is Never Lost!!   Right is right, wrong is wrong! The truth is the truth and a lie is a lie! DEAL WITH IT ACCORDINGLY !!!   I HATE "DIAL-UP"

Offline Retro Rocket

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Re: Painting new stripes on old paint. Prep?
« Reply #7 on: April 23, 2015, 10:02:41 PM »
Quote
Retro Rocket; Are the 2 products you mentioned "prep wash or prepsol" the name of the product themselves or just general types ?

Product names   ;)  If the names are different in the US {i'm in Australia} just ring an auto paint shop and ask for the name of the product they use....
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Offline Retro Rocket

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Re: Painting new stripes on old paint. Prep?
« Reply #8 on: April 24, 2015, 03:18:15 AM »
I think Klean-Strip "might" not be what you want. But Lowes (or any other hardware store, even WalMart) carry Denatured Alcohol in its standard form. Right next to Acetone, in fact...

If you are planning to shoot from a can, SprayMax 2K is a decent enough product. You will need to blend it into your existing, which will still show unless you can find a panel line where you can stop (fender alone, hood, door panel...).

You probably need to cut and buff the existing paint carefully afterwards to help blend the two together. The existing clear coat will be heavily fogged up by now, and the new clear will shine.

Denatured alcohol is what we call "methylated spirits"  here in Australia, its just ethanol with additives to stop people drinking it, what he wants is a type of 100% hydrocarbons {prepsol, prepwash or wax and grease remover} , thats what spray painters use to wash down cars and bikes with before painting, then tack rag and off you go.... ;)  Dupont and PPG both make prepsol

https://www.google.com.au/search?q=prepsol&biw=1366&bih=663&source=lnms&tbm=isch&sa=X&ei=ahc6VZ30E4vt8AWC8oDgBg&ved=0CAYQ_AUoAQ#imgrc=H6sjeIxn5tNXZM%253A%3BqgoyQNVMvQzxCM%3Bhttp%253A%252F%252Fwww.mcqagencies.com.au%252Fproductimages%252FPREP-20.jpg%3Bhttp%253A%252F%252Fwww.mcqagencies.com.au%252FPREP_dash_20%252FPrepsol-20ltr%252Fpd.php%3B569%3B600
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.