primer spots in my top coat arrrr

[allkarma]

i`m using cellulose,and re painting my fiberglass bodied kit car black.
I had quite a bad finish on the roof,loads of orange peel(new to painting).
I used,1200 then 2000 wet sand to smooth out the peel then it had a satin finish.
Then started to compound the roof in sections to achieve a mirror finish.
All was going great,you could`nt fit my ego in the garage until the last section,i burned through the paint ,i can see primer spots .
What shall i do ?

Can i blow in some color,touch up ?

Or Do i key up the whole roof,and re apply some more top coats.If so what grade of paper shall i use to key up. As the roof is super smooth.

Or do i start from fresh,primer and top coat.

P.s with my orange peel i`m getting,could it be down to me owning a cheap hvlp gravity gun. As i have a great big compressor,regulator at the gun, Filters fitted ect.
Only ask as i won a devilbiss gti on e bay and was wondering shall i wait till that comes in the post before i apply more coats.
Also the devilbiss gun has a 1.4 fluid tip & gti 110 air cap is this set up ok for cellulose.
Many thanks

 

[jaykay]

see spec sheet for gun set up,but sounds about right.
i'd lightly blow in break thu.patches then a cpl of coat over the whole roof.
mask well to gutter line.

 

[Knipex]

Rub down the entire roof with 1000.

Blow in the areas showing primer.
Give the entire roof a couple of coats.

Rub down and buff.

Call it a learning experience.

If I was wet sanding and buffing a car I would give a minimum of 6 coats but that's just me.

 

[mike os]

Rub down the entire roof with 1000.

Blow in the areas showing primer.
Give the entire roof a couple of coats.

Rub down and buff.

Call it a learning experience.

If I was wet sanding and buffing a car I would give a minimum of 6 coats but that's just me.

ditto