new clear over old clear??

My friend bought a muscle car about 5 years ago. At that time it had been recently freshly repainted within the year. He knows for sure that it was done in a base coat and clear coat. The guy who used to own the vehicle doesn't remember what brand of clear was used.

Now my friend wants to add some stripes in a different color.

I have two questions.

1. Can he just scuff down the areas he wants painted and then just spray the new color? Essentially scuff and shooting over the old clear.

2. When it comes time to put clear over the new areas, can he spray the new clear over the whole car? Does it have to be the same brand of clear or can you use a different brand? Will there be an adverse reaction with the old clear?

Thank you for your input

 

Id say use the same clear, does he know what brand. if not, well good luck, could be OK could be terrible.

 

Should not be a problem normally. I do it everyday in the course of collision repair. We refinish over many different brands of clearcoat, using DuPont clear. Stu

 

I agree with Stu, should not be a problem. I would scuff the whole car with a red scotch brite, shoot the stripes and then clear the whole car.

 

No need to clear the whole car too, just make sure you have a little overspray and polish the area's next to the freshly painted stripes.

 

what they said, although I prefer wet sanding and test patch to verify that the old clear and new paint and clear are compatible (watch for lifting/wrinkling)

wet sand area on and around new paint area, paint, blend the clear almost up to where you didn't sand, dry, wet sand everything and buff to brilliance

 

x2. The wet sanding afterwards is a very good point! A real good polishing job actually always begins with that.

 

Impala Builders got it. Once the Clear coat is Hard it is usually pretty solid. Sand a small area and reclear. It theres no chemical reaction your good to go. Problems usually happen when the last guy cuts corners. Doesn't use the right hardener or no hardener.

I've used clear as a sealer over problem paint work. Scuff the area clear it and let things happen. Then come back to it about a week later,sand the area and do what you wanted to do. Worked in a pinch.

The Old Tinbasher

 

you do have to be careful when you put basecoat over some clears, sometimes if you put it on too wet, or if you break thru the old clear to the basecoat you can lift the old clear and it will wrinkle. you dont have to clear the whole car just for stripes if you dont want a sharp edge where the stripe edge is just clear the panels that you stripe unless your striping the entire car.

 

The old clear doesn't look great I don't think it was ever buffed out. So I guess he will scuff the whole thing with a redpad and then reclear the whole thing then cut&buff after.