Problem After Sanding Down Touch-up Paint
- Thread starter slvrshadow94tt
- Start date
forrest@mothers
Serious no BS kinda guy
Langka makes 2 different products - one is a chemical product that softens/removes the blob (and it's the one we also sell as our part # 08540), and the other is a wet-sand type of kit.
slvrshadow94tt
New member
I do not have any "factual" data to confirm the abrasiveness of Langka. In fact, I did not know that they made two different products. I believed it to be simply a chemical solvent. I ordered it directly from Langka and used it per the directions supplied. In my particular experience, I was having little success achieving the results I wanted because the Langka and wiping process would continually remove too much of the touch-up paint from the chip. I then decided to allow the touch-up paint to cure for longer periods of time before using the Langka. That resulted in having more control over how much blob was being leveled. But it also meant that the Langka would take longer to do its job. After rubbing for a while using only slight pressure, I started noticing light marring/scratching around the repaired chip after buffing off the excess Langka. I was very surprised by this. After experiencing this many more times using different wiping materials, I placed some of the Langka solution from the wiping cloth between my fingers and it felt like an extremely fine sand. Maybe Langka sent me the wrong stuff?
Hi,
good stuff here. I have a question and some exp. to share. I am currently working on some touch up of my '01 prelude and need some advice.
1. I am using the the Dupla repair kit and it states that i need the primer before using the touch up paint. However, the Honda touch-up paint seems to be oil-based and melts the primer... thus mixing the two colors. I have now resulted in skipping the primer step and just adding the paint and then the clear top coat. is this ok?
2. I have various types of paint chip problems: gravel marks on the metal surface of hood, and scratches/indentations and what i refer to as comet trails along the front and back bumpers. By "comet trails" what i mean is that it looks like ripples before and around where the gravel digs into the bumper areas. I have sanded these ripples down but i cant seem to paint on them.... will i have to sand these lower than the surface?
3. I had a verticle scratch down the front bumper, what i did to level it was this... put slight amount of paint and the create a minor hill over the affected area. i folded the 2000 grit sandpaper to make a hard edge. much like how a player card can be used to scratch an itch it is now prepped to scratch/sand the effected area. the clearcoat does not stick that well to the paint and the hill gets more pressure from the hard edge. eventually this becomes level... but i admit i think it took me more than just 5 or 6 passes.
good stuff here. I have a question and some exp. to share. I am currently working on some touch up of my '01 prelude and need some advice.
1. I am using the the Dupla repair kit and it states that i need the primer before using the touch up paint. However, the Honda touch-up paint seems to be oil-based and melts the primer... thus mixing the two colors. I have now resulted in skipping the primer step and just adding the paint and then the clear top coat. is this ok?
2. I have various types of paint chip problems: gravel marks on the metal surface of hood, and scratches/indentations and what i refer to as comet trails along the front and back bumpers. By "comet trails" what i mean is that it looks like ripples before and around where the gravel digs into the bumper areas. I have sanded these ripples down but i cant seem to paint on them.... will i have to sand these lower than the surface?
3. I had a verticle scratch down the front bumper, what i did to level it was this... put slight amount of paint and the create a minor hill over the affected area. i folded the 2000 grit sandpaper to make a hard edge. much like how a player card can be used to scratch an itch it is now prepped to scratch/sand the effected area. the clearcoat does not stick that well to the paint and the hill gets more pressure from the hard edge. eventually this becomes level... but i admit i think it took me more than just 5 or 6 passes.
Jesstzn
New member
I was using DavidBs' chip repair method and also experienced the cupping around the repair after wet sanding.
Well I had a brain storm the other day during an idle moment .. Here is what I thought of and it did work.
A) prep area and apply the touchup blob per Davids instructions.
B) Lay a 4" strip of blue painters masking tape over the blob
C) Take a pencil and with the side of the lead draw it back and forth over the blob bump on the tape tracing the shape.
D) Plade a piece of 2" celo packaging tape on a piece of glass or hard plastic. This tape is very thin.
E) Remove the masking tape and stick it on top of the packaging tape.
F) using an Olef style knife with a new tip carefully cut out the tracing of the blob cutting through both layers of tape.
G) Remove and discard the masking tape.
H) Place the packaging tape on the area with the blob sticking through the hole.
I) Place a few more strips of tape on each side of the first strip careful not to overlap them. They should butt together.
J) Now using a block and wet/dry paper wet sand the blob down to tape level.
K) Remove the packaging tape and a sanding stroke or 2 finishes it.
Its not a perfect alternative nor is it great if your doing 20 spots but I have done 3 chips in 2 sq " with success .. I haven't tried it on chips bigger than 3/16" or so
Well I had a brain storm the other day during an idle moment .. Here is what I thought of and it did work.
A) prep area and apply the touchup blob per Davids instructions.
B) Lay a 4" strip of blue painters masking tape over the blob
C) Take a pencil and with the side of the lead draw it back and forth over the blob bump on the tape tracing the shape.
D) Plade a piece of 2" celo packaging tape on a piece of glass or hard plastic. This tape is very thin.
E) Remove the masking tape and stick it on top of the packaging tape.
F) using an Olef style knife with a new tip carefully cut out the tracing of the blob cutting through both layers of tape.
G) Remove and discard the masking tape.
H) Place the packaging tape on the area with the blob sticking through the hole.
I) Place a few more strips of tape on each side of the first strip careful not to overlap them. They should butt together.
J) Now using a block and wet/dry paper wet sand the blob down to tape level.
K) Remove the packaging tape and a sanding stroke or 2 finishes it.
Its not a perfect alternative nor is it great if your doing 20 spots but I have done 3 chips in 2 sq " with success .. I haven't tried it on chips bigger than 3/16" or so