Warped Hood-Flating Suggestons

[69NovaYenko]

Have a quick question.

I have a resin hood that fits ok except for the left and right rear edges near the cowl are slightly kicked up, jut enough to make the hood not sit totally flat on the body.

So, I`m looking for suggestions on ways to flatten out the warped ends. I did peruse MCM archives and saw a post where one of the forum member suggesting using a “hair dryer” and  another a “heat gun”. I do have both (haie dryer/heat gun) but was wondering if there were any other suggestion for attacking the issue. By the way if it makes any difference the part is cast in that tan colored resin and I suspect it may be a bite brittle.

[Miatatom]

Using heat is risky, especially if you've never attempted something like this. Can't sand the edges down?

Maybe someone who has done it can teach us both.

[69NovaYenko]

 Can't sand the edges down?

Maybe someone who has done it can teach us both.

The hood edges slightly swooping up is not do due to the part being to thick, so unfortunately sanding is not going t resolve the issue. But thanks for the suggestion.

 

 

[RAT-T]

I HAD GOOD LUCK FIXING A WARPED BODY WITH HOT WATER

[69NovaYenko]

I HAD GOOD LUCK FIXING A WARPED BODY WITH HOT WATER

How hot did you get the water...Boiling?????

[Mark]

Some hood designs just don't lend themselves to resin casting, at least not the way some casters do them.  If you've got a hood that is extremely thick in one area (say, the scoop) and thin in adjoining areas (the outer edges), then those outer corners are going to curl upwards like that.  It didn't curl at the front corners because the scoop doesn't extend all the way to the front, so the front of the hood is a more consistent thickness.  I've done a fair amount of resin casting and have sold enough parts to know what's going on, from my own experience.  

I have two resin examples of the same hood ('67 Yenko Camaro) from two different casters.  Each did their own master (one is not a copy of the other) but both are designed the same way: thick scoop area, rest of the hood is as thin as the original kit piece.  Both have the curled rear corners issue you describe.  I bought the second one a couple of years after the first, after seeing the problem on the first one.  The second one did the same thing.  I'll probably cut the scoop from one of them and graft it onto a styrene hood from the kit.   

[RAT-T]

How hot did you get the water...Boiling?????

NO, JUST AS HOT AS IT COMES OUT OF THE FAUCET.

WITH WHAT MARK JUST COMMENTED, THE BODY I FIXED HAD REALLY THICK RESIN IN THE ROCKER PANEL AREA, BEFORE RUNNING IT UNDER THE HOT WATER, I THINNED THE THICK AREA DOWN AS CLOSE TO THE SURROUNDING AREA AS I COULD, THAT WAY THE RESIN WOULD HEAT UP EVENLY. IT TOOK ME A FEW TIMES TO GET WHERE I NEEDED IT, THEN I SOAKED IT IN COLD WATER.

YOU MIGHT WANT TO KEEP THE BODY CLOSE TO USE AS A GUIDE

[69NovaYenko]

NO, JUST AS HOT AS IT COMES OUT OF THE FAUCET.

WITH WHAT MARK JUST COMMENTED, THE BODY I FIXED HAD REALLY THICK RESIN IN THE ROCKER PANEL AREA, BEFORE RUNNING IT UNDER THE HOT WATER, I THINNED THE THICK AREA DOWN AS CLOSE TO THE SURROUNDING AREA AS I COULD, THAT WAY THE RESIN WOULD HEAT UP EVENLY. IT TOOK ME A FEW TIMES TO GET WHERE I NEEDED IT, THEN I SOAKED IT IN COLD WATER.

YOU MIGHT WANT TO KEEP THE BODY CLOSE TO USE AS A GUIDE

Thanks for the clarification.

Some hood designs just don't lend themselves to resin casting, at least not the way some casters do them.  If you've got a hood that is extremely thick in one area (say, the scoop) and thin in adjoining areas (the outer edges), then those outer corners are going to curl upwards like that.  It didn't curl at the front corners because the scoop doesn't extend all the way to the front, so the front of the hood is a more consistent thickness.  I've done a fair amount of resin casting and have sold enough parts to know what's going on, from my own experience.  

I have two resin examples of the same hood ('67 Yenko Camaro) from two different casters.  Each did their own master (one is not a copy of the other) but both are designed the same way: thick scoop area, rest of the hood is as thin as the original kit piece.  Both have the curled rear corners issue you describe.  I bought the second one a couple of years after the first, after seeing the problem on the first one.  The second one did the same thing.  I'll probably cut the scoop from one of them and graft it onto a styrene hood from the kit.   

You have described the situation I have to the letter. Maybe cutting the scoop from resin piece and grafting it onto a styrene hood from the kit might be the best option. Hummmm...left me think that one over.