Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-15-08, 07:09 PM   #1
jimerone
Member
Thread Starter
 
Join Date: Feb 2008
Bikes:
Posts: 28
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
can i sand my clearcoat ? (spraypaint help)

sorry to keep bothering everyone with my stupid spray painting questions.. but im almost done !

im finally clear coating my bike..ive already stripped, primed and painted it. (im using spraypaint)

it looks great, but my clear coat feels rough. can i sand my clear coat and spray another coat.

it was smooth until my clear coat.

thanks
jimerone is offline   Reply With Quote
Old 04-15-08, 07:18 PM   #2
luker
juneeaa memba!
 
Join Date: Oct 2003
Location: boogled up in...Idaho!
Bikes: Crap. The box is not big enough...
Posts: 5,628
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Use a very fine sandpaper, like 280 or greater. I usually go down a grit between each coat, finishing at about 600. you can then polish with something like swirlcut.
luker is offline   Reply With Quote
Old 04-15-08, 07:20 PM   #3
somebadlemonade
Senior Member
 
Join Date: Apr 2008
Location: Bay Area, California
Bikes:
Posts: 183
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It's called orange peel or FLA(fat lady's ass) it's easy to get rid of.
You need to wet sand it, get a spray bottle and fill it with a water and dish soap mixture. You only need to put maybe a teaspoon for 16oz. of water. Get some 600 grit wet/dry sand paper, you don't need to put a lot of pressure on it to get it smooth, if you doubt yourself in your ability to do so, you can glue it to a sponge for dish, just sand it till it's smooth. . .
After that it's all pretty easy, make sure you put a drop cloth or tarp down so you don't have to mop up too much of the mess.

Also make sure to rinse it off, ESPECIALLY if you plan on putting more clear coats.
somebadlemonade is offline   Reply With Quote
Old 04-15-08, 07:24 PM   #4
amillhench
TXHC
 
amillhench's Avatar
 
Join Date: Mar 2008
Location: Heights, TX
Bikes:
Posts: 308
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
For clearcoat you will want to use 1500 or 2000 wet sand paper. Not regular sandpaper, but sand paper made for wet application.
You can find tons of info about this by simply googling "wetsand clearcoat". With spray clear its not really worth it, and if you can feel it but can't see it, why bother?
I used actual 2 stage CC and didn't wetsand. Looks fine, its a bike not an El Camino Cheers.
amillhench is offline   Reply With Quote
Old 04-15-08, 09:14 PM   #5
dbakl
Senior Member
 
Join Date: Nov 2005
Bikes: Cinelli, Paramount, Raleigh, Carlton, Zeus, Gemniani, Frejus, Legnano, Pinarello, Falcon
Posts: 5,775
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rubbing compound?
dbakl is offline   Reply With Quote
Old 04-15-08, 09:59 PM   #6
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
rubbing compound comes after the wet 1500~2000 grit sanding.
Just go to the automotive section, they'll have tons of 400~2000 grit waterproof sandpaper. Best to use silicon carbide over aluminum oxide if you can find any.

rubbing compound is anywhere from 5000~10000 grit and works well if you have the buffing wheel attachment to your power tool. Otherwise it's a lot of rubbing work
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 04-16-08, 12:14 AM   #7
j0e_bik3
"this is not suck"
 
j0e_bik3's Avatar
 
Join Date: Feb 2008
Bikes:
Posts: 387
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
google "colorsanding and polishing" and you'll get about ten thousand pages and 47 you tube vid clips

also polishing with a rotary buffer on a tubular surface like a bicycle frame is just ASKING for a burn through, ESPECIALLY if it's a lugged frame.

one note! spray can paint wont sand very well until it's COMPLETELY cured and rock hard, and thats going to be about 30-45 days after you shot it.

if it was me, and I was where you are,...I'd sand the entire thing with 400 wet till all the "FLA" is sanded out, then before shooting it again, PRACTICE on a steel pipe so you figure out HOW to shoot with NO orange peel.

then you don't have to sand and polish,...... trust me it's a thousand times easier to just blow on another coat of clear than to try and finesse a tubular bicycle frame.
j0e_bik3 is offline   Reply With Quote
Old 04-16-08, 07:35 AM   #8
ricohman
Senior Member
 
ricohman's Avatar
 
Join Date: Mar 2007
Location: Saskatchewan
Bikes:
Posts: 2,464
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
1500-2000 wet sanding.
Careful around any edges though. With to much pressure you will go right through the clear.
ricohman is offline   Reply With Quote
Old 04-16-08, 08:00 AM   #9
jebensch 
Senior Member
 
jebensch's Avatar
 
Join Date: Nov 2007
Location: Medford, MA
Bikes: Gazelle Champ Mondial, Nishiki Comp II, Moto Grand Record, Peugeot UO-10, Koga-Miyata SS
Posts: 1,225
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
[QUOTE=j0e_bik3;6527100
one note! spray can paint wont sand very well until it's COMPLETELY cured and rock hard, and thats going to be about 30-45 days after you shot it.

[/QUOTE]

+1

In my experience with Krylon or Rustoleum types; even 600 or 800 has taken the clear right off even with light pressure when I tried it a couple days later.
__________________
Steel-loving cheapskate

www.jessebenjamin.blogspot.com
jebensch is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 04:10 PM.