Spot Repair Problem
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I have recently tried to do a couple of spot repairs and have experienced a problem when applying the blending clear. In each case I have been trying to repair freshly painted such as where I burned thru buffing. After I apply base and clear I have used SEM blending clear to blend the area. Each time the when I apply the blending clear it cooks or lifts where it is applied. Any ideas why this is happening, am I applying it too heavily? Is it because of the product or the fact that I am using it on paint that has not fully cured?
if your going over fresh paint the solvents in the blanding clear are eating up the feathered out edges like its paint stripper. got to remember your working with solvents here. one layer will always bite into to next…to a point. even on fully cured clear you can have wrinkling issues. best thing to do is lock down the burn through with primer. the primer will kick off a leave you with a little bit of protection/solvent barrier. you can try to spray the blending clear alot lighter using faster reducer. this may work it may not and depend on how sensitive the original clear is and how strong the solvents are in the layers going over it.
I’ve had problems before with the SEM blender. I found it very aggressive and had a wrinkling issue with it too, haven’t used it since….it even had a really strong smell to it unlike most others I’ve used. The fresh paint certainly doesn’t help, although I’ve had no problems doing it with the BASF or S&W blenders on fresh clear.
I will try another blending clear but do you think I might get better results by mixing my on blending clear from the clear I used or baking the paint for awhile before I attempt the repair. I agree that the smell of the SEM was strange strange and was a strong odor.
If the blending reducer calls for activated clear then I would use, otherwise not. Baking it for a bit wouldn’t hurt anyhow. The SEM blender I used was in aerosol form so I never had the option of adding clear, I really didn’t like it.
Mine was in an aerosol as well, I think I will try some BASF. Thanks
The difference between them is night and day, either BASF or Sherwin williams makes a good one too(BS10)….you can get that in aerosol form also, works great.
Thanks and I enjoy and learn a lot from your videos, I hope you keep them coming
I like UPOL’s fade out. Use it all the time.
It’s funny, I was just browsing through BASF’s tech tips and came across this:
[b]Clearcoat Blending with UBR200[/b] :teach
Number: RMBUL2196-E Date: May 01, 2009
The reduced mil thickness of a clearcoat blend edge may cause the edge to become visible with time. Aggressive polishing and harsh weather conditions will accelerate this process. Consequently, BASF will not normally guarantee the blend edges of clearcoats. To be eligible for the R-M warranty, clear must be applied to the entire panel or repaired according to the R-M CTR Repair System by a CTR certified painter.
Because there are situations when clearcoating an entire panel are not possible, R-M developed the UBR200 Blending Solvent. UBR200 is a unique blend of solvents designed to melt in dry overspray and blend edges of Diamont Clearcoats and UNO-HD. Using the UBR200 to melt in clear edges is not covered under the R-M warranty.
[b]UBR200 Application Procedure[/b]
1. Let final blended coat of clear flash off for 5 minutes.
2. For optimal performance, mix 5 parts of UBR200 to 1 part R-M Clearcoat (RFU).
3. With reduced air pressure, apply 1-2 coats of above mixture over blend edges.
4. Allow 5-7 minutes flash between coats of UBR200.
5. Allow clear to cure according to the recommendations in the R-M technical manual.The UBR200 can also be used to blend the final coat of UNO-HD. To achieve an undetectable blended finish with UNO-HD, please follow the procedure mentioned above replacing the ready-for-use clearcoat with ready-for-use UNO-HD.
Figures, I go to the training course and they are dead opposed to mixing in any clear with the blender, nor does the tech sheet suggest it. Unbelievable. :chair
…they also taught you to spray the blender right away, this suggests waiting.
that is a new procedure. It use to be not to add clear to the ubr. interesting.
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