Chipping?

[snapper]

A couple of questions...thanks again for the help - Colby

-Chipping - After airbrushing, I had areas that started to chip after about 30 min. of drying time and when I attempted a wet sand (lacquer model masters paint over duplicolor white sandable primer). I was doing this wet sand because I had the airbrush too far away. Was this due to -
A)impatience (and lack of drying time),
B)type of primer,
C)temperature - too cold?,
D)or not enough primer in areas (I noticed this was in areas where I may not have had enough primer coverage, such as the edges.)

My test piece after about 30 min. drying time produced about the same kind of "chipping results". But the flat black I laid down several weeks ago seemed to adhere to the primer just fine. I have a feeling it's A, but I just wanted to ask you all that know about these kind of things.

I'm learning a lot here, but I'm just trying to figure out all these variables.

[drglue]

My first thought would be this...

A) impatience (and lack of drying time)

...if you smell any fumes when you sniff the painted surface, it hasn't cured completely...and there can be problems with adherance, cracking, or "hazing"...

This is a possibility, too.

C) temperature - too cold?

...variables in atmospheric conditions can affect paint...lower temperatures and higher humidity will both affect how long it takes for paint to cure....

[Chris M]

I would go with impatience. Lacquers take a while to dry. 30 min would probably even be to soon for acrylics which dry pretty quick.

[snapper]

Thanks fellas - I put the final coat on earlier today (about 4), so I'm just going to let it set and cure up. I think I was trying to rush things with the wet sand and all, but I'm not going to mess with it for a while. The finish isn't that great, but I think I know what I need to do next time for a better job - it'll do for my first time around. This dirt track racer will certainly have "character"

[roadhawg]

Sounds like it'll be ok to me.....only the "high dollar" guys had fancy paint jobs anyway. Back in the 70s, I actually saw these two brothers painting their hobby class dirt car with.....are you ready for this? BROOMS! Yep...they would dip 'em in a bucket of latex house paint and just swoosh it on! And the funny thing was, it looked great from the stands!

Thats the good thing about modeling old dirt track cars.....if you mess it up, it makes it more accurate! Lol. Can't wait to see it, Colby!

[Ken McDevitt]

Sounds like it'll be ok to me.....only the "high dollar" guys had fancy paint jobs anyway. Back in the 70s, I actually saw these two brothers painting their hobby class dirt car with.....are you ready for this? BROOMS! Yep...they would dip 'em in a bucket of latex house paint and just swoosh it on! And the funny thing was, it looked great from the stands!

Thats the good thing about modeling old dirt track cars.....if you mess it up, it makes it more accurate! Lol. Can't wait to see it, Colby!

NEWS FLASH FROM MICROMARK..............................

"New product release of micro brooms for that dirt track look"

[snapper]

.....are you ready for this? BROOMS!

Brooms? hmmm........I think I have a few horse hair brushes around...

I have to keep telling my self that "It's only a dirt track racer, it's only a dirt track racer." But I tell you, I have learned so much with this car. It definitely has it's mess ups, but I think I have pretty much figured them all out for the next time.

I don't want to disappoint, but I won't make the deadline. Doing this one in about 6 months compared to my last build at 1 year, I guess I'm doing pretty good. I hope to keep the progression up with speed. I'll be about 1 week short with this one - All I have is to letter, slap the bumpers on, and do just a few details like mirrors, tire plugs, etc. The lettering is going to take some time, because I'm going to do it by hand - have to stencil all that out.