I had a couple of spots that needed to be repaired in fresh paint (4-5 days old). I resanded the areas wiped it with dupont 3812 applied my first coat of color let it flash (looked great)applied my second coat of color 30 seconds later it was bubbling up. it bubbled up all the way to the sealer coat.it did not react in all areas only about 1/2 and seamed to be in areas where the clear was cut through. the products i am using are all dupont

sealer 2540
paint is chromabase w/7175 basemaker
the clear is chromapremier 72200s w/12306 activator and 12385 reducer.

any input would be helpful

thanks in advance
Ron

Sounds like you put your color on too heavy.I sometimes dust a little sealer or primer over the areas to keep it from lifting then sand lightly and dust my color on.You must use very light coats of color or it will lift the edges as you found out!!You'll need to resand the areas that lifted past where they lifted and try again.
Mike

Mike has it on the dot. What is happening is the solvent from your new spraying gets under the edge of the sand thru. You need to lessen the amount of solvent able to do it, period.

This may have started with your 3812, what is that? It sounds like an enamel reducer. (USE PROPER SURFACE CLEANING PRODUCTS! DuPont 3901S would be the one. As well as use it properly, wipe on and wipe off while wet, then be sure to let ANY possible solvent that stayed flash off BEFORE any color is applied) If that is the case you started out by putting straight solvent on the area and this solvent got in and softened the edge BEFORE you even painted anything!

You want to use a fast basemaker in your color, or any solvent used with sealer, clear or what not. Be sure you are at proper temps and the surface is at a proper temp. A little cool, and those solvents have longer to soak in under the edge.

I personally think that the sealer has solvents as well, so they aren't going to help you any. Use the base coat as your "sealer" by applying it very lightly as Mike described.

Second, be sure to sand with the finest paper possible when making these repairs. 600, or even 100 will leave less of a chance of solvent getting under that edge because the scratches are smaller.

thanks for the help, I will get faster reducers and put on lighter coats

ron

Yep 3812 is enamel reducer. You should use something like Final Kleen.(3939 i believe) That enamel reducer is a pretty hot solvent.