Grit dog
Full Access Member
- Joined
- May 18, 2020
- Posts
- 6,932
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- 12,151
- Location
- Auburn, Washington
- First Name
- Todd
- Truck Year
- 1986, 1977
- Truck Model
- K20, C10
- Engine Size
- 454, 350
Thought I’d share a little issue I had painting.
While putting down the secondary color base coat over a feather edge of the primary color, already sprayed and cured and re-prepped. (Pic of 2 tone for reference first color laid down “wide” and then taped off for second color.)
First coat of base resulted in a raised edge along the feather edge of the paint below it.
Second coat made it worse, thinking I’d try to “bury” the issue with more paint.
Ended up scraping the new paint AND the previous color back down to primer (right away and then sanded and re painted) and the bottom color was SOFT. Like scraped off with a putty knife soft, clean right down to primer.
The issue, I learned, is base coat doesn’t cure hard enough that the reducer in fresh paint won’t soften or eat it up. And spraying too heavy of an initial coat will cause this to happen.
Makes sense, usually I go light on first coat but this area was awkward to reach and I recall first coat going down heavy. And it ate the base coat under it.
Short story, is 2 stage paint, don’t pile on the first coat of base over other base. A light coat will flash quick enough that it doesn’t sit “wet” very long. Sort of sealing it up and giving successive coats something to bite into.
While putting down the secondary color base coat over a feather edge of the primary color, already sprayed and cured and re-prepped. (Pic of 2 tone for reference first color laid down “wide” and then taped off for second color.)
First coat of base resulted in a raised edge along the feather edge of the paint below it.
Second coat made it worse, thinking I’d try to “bury” the issue with more paint.
Ended up scraping the new paint AND the previous color back down to primer (right away and then sanded and re painted) and the bottom color was SOFT. Like scraped off with a putty knife soft, clean right down to primer.
The issue, I learned, is base coat doesn’t cure hard enough that the reducer in fresh paint won’t soften or eat it up. And spraying too heavy of an initial coat will cause this to happen.
Makes sense, usually I go light on first coat but this area was awkward to reach and I recall first coat going down heavy. And it ate the base coat under it.
Short story, is 2 stage paint, don’t pile on the first coat of base over other base. A light coat will flash quick enough that it doesn’t sit “wet” very long. Sort of sealing it up and giving successive coats something to bite into.
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